aegis bearing protection ring handbook · 2020. 6. 26. · edition 3 bearing protection handbook...

Edition 3

Bearing Protection HandbookBest Practices for Bearing Protection in New and Repaired Motors, Testing In-Service Motors, and Inspecting Damaged Motor Bearings

Register your motor for theAEGIS 2-Year Warranty Against Bearing Fluting DamageW

© 2018 Electro Static Technology, An ITW Company, All rights reserved.Artwork and layout by Joanne Audet, Electro Static Technology

No part of this book may be reproduced without permission in writing from Electro Static Technology, except by a reviewer who may quote brief passages or reproduce illustrations in a review with appropriate credit; nor may any part of this book be reproduced, stored in a retrieval system, or transmitted in any form or by any means - electronic, photocopying, recording, or other-without permission in writing from Electro Static Technology.

This book is generally reviewed every year and updated. Comments and suggestions are invited. Any errors or omissions in the data should be brought to the attention of the Editor. Additions and corrections to the Handbook in print will be in the Handbook published the following printed edition and, as soon as verified, on the Electro Static Technology website.

Disclaimer - Application notes are intended as general guidance to assist with proper application of AEGIS® Shaft Grounding Rings to protect motor bearings. All statements and technical information contained in the application notes are rendered in good faith. User must assume responsibility to determine suitability of the product for its intended use.

ISBN 978-0-9905745-4-5

Follow all workplace safety policies and procedures applicable to electric motor repair and for all hazardous operations. Wear all applicable personal protective equipment (PPE) required by the applicable law. Employees should be informed of the relevant safety rules and employers should enforce compliance. The manufacturer shall not be liable for any injury, loss or damage, direct or consequential arising out of the use, or attempt to use the product or procedures described in this manual.

SAFETY

Electro Static Technology (EST, AEGIS®) guarantees that AC induction motor bearings will not fail from electrical fluting damage when AEGIS® Shaft Grounding Rings have been installed with new bearings in accordance with EST’s recommended best practices, as published in the AEGIS® Bearing Protection Handbook (current edition). See page 55 for more information about the 2-Year Extended Warranty, or visit www.est-aegis.com.

Register your motor at www.est-aegis.com/warranty

Units are guaranteed for one year from date of purchase against defective materials and workmanship. Replacement will be made except for defects caused by abnormal use or mishandling. All statements and technical information contained herein, or presented by the manufacturer or their representative are rendered in good faith. User must assume responsibility to determine suitability of the product for intended use. The manufacturer shall not be liable for any injury, loss or damage, direct or consequential arising out of the use, or attempt to use the product.

2-YEAR EXTENDED WARRANTY

Electro Static Technology, An ITW Company, is a global manufacturer and inventor of AEGIS® Shaft Grounding Rings used in electric motors and other rotating equipment to safely discharge variable frequency drive (VFD) voltages to ground. AEGIS® Shaft Grounding Ring technology is installed in all ranges of motors from fractional horse power to large medium voltage motors used in virtually all commercial and industrial applications.

AEGIS® Shaft Grounding Ring technology is the only technology that combines both contact and non-contact nanogap technology to reliably protect bearings from electrical discharges that cause pitting, frosting and fluting damage. AEGIS® Ring technology uses proprietary conductive micro fibers arranged circumferentially around the motor shaft and secured in our patented AEGIS® FiberLock™ channel which protects them during operation. The following patents apply: 8199453, 8169766, 7193836, 7136271, 7528513, 7339777, and other patents pending.

Electro Static Technology is proud to be an ISO 9001:2015 company. Certificate Number: 17116

COMPANY INFORMATION

AEGIS® Handbook | 3 © 2018 Electro Static Technology

Register your Motor for the AEGIS 2-Year Extended Warranty www.est-aegis.com/warranty

www.est-aegis.com 1-866-738-1857

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The Electro•Mechanical Authority

Use of the EASA logo expresses membership only and not endorsement by EASA of the content in this handbook.

Introduction to Bearing Currents 4-5

About VFD Induced Shaft Voltages & Bearing Currents 6-12

Motor Grounding 13

AEGIS® Technology 14-17

AEGIS® Shaft Grounding Best Practices - Low Voltage 18-21

AEGIS® Shaft Grounding Best Practices - Medium Voltage 22-27

AEGIS® Shaft Grounding Best Practices - DC Motors 28-29

AEGIS® Installation and Shaft Preparation 30-33

AEGIS® Shaft Voltage Testing 34-43

Selecting the Correct Size Ring 44

AEGIS® Bearing Protection Ring Parts List 45-53

Engineering Specification 54

AEGIS® 2-Year Extended Warranty Description 55

TABLE OF CONTENTS

www.est-aegis.com 1-866-738-18574 | AEGIS® Handbook © 2018 Electro Static Technology

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ANSI/EASA Standard AR100-2015, Section 2, Mechanical Repair: 2.2 Bearings“Bearings should be inspected for failure modes such as spalling, contamination, fretting, fluting, and scoring.”

Operation of Electrical Motors by Variable Frequency Drives:AC Motors operated by variable frequency drives (VFD) use pulse width modulation (PWM) to control the speed of the motor. This means that there are common mode voltages which are capacitively induced onto the shaft of the motor and can discharge in the motor’s bearings causing electrical discharge machining (EDM) pitting, frosting and fluting damage which results in unplanned downtime and repair costs. In addition, larger motors over 100 HP (75 kW) and medium voltage motors may also have high frequency circulating currents which can also cause EDM pitting, frosting and fluting damage. DC Motors on drives may also have capacitively induced shaft voltage which can discharge in the motor’s bearings and in addition, motors over 10 HP (7.5 kW) may also have circulating currents.

Bearing Protection Specified for New Motors and Motor Repair:It is essential that motors operated by VFDs or DC drives are configured for bearing protection from both types of current sources. Installing AEGIS® Shaft Grounding Rings provide a proven and reliable ground path to discharge the capacitively induced voltages safely away from the motor’s bearings to ground. Motors with circulating currents should also have shaft or housing insulation or one insulated bearing installed on opposite end from the AEGIS® Shaft Grounding Ring to stop the high frequency circulating current path. This approach is the recommended best practice to make inverter driven motors “True Inverter Duty” by protecting the most critical mechanical component of the motor – the motor’s bearings.

Bearing Inspection:Whenever a VFD driven motor fails, the motor’s bearings should be removed, cut, and inspected for evidence of EDM discharges. Sometimes it is obvious because the damage is visibly apparent with a “washboard” fluting pattern on the inner or outer bearing race. The ANSI/EASA AR100-2015 recommends this practice for all electric motor repairs. Preventing this failure mode from the start creates a common sense methodology for increasing the reliability of all VFD driven motor systems.

Shaft Voltage Testing:The NEMA MG1 Part 31.4.4.3 identifies capacitive shaft voltages of 10 to 40 volts peak (or 20 to 80 volts peak-to-peak) as a level which could cause electrical discharges in a motor’s bearings. Testing for shaft voltages is the best way to confirm the need for AEGIS® Shaft Grounding Rings on VFD driven electric motors to prevent EDM bearing damage and to ensure uptime and reliability. The AEGIS® Shaft Voltage Tester™ Digital Oscilloscope is specifically designed to measure and record shaft voltages.

Shaft voltage testing is best accomplished as early as possible in the operation cycle of the VFD/Motor system and whenever a new motor is installed, after a motor repair or bearing replacement is done, and upon commissioning of newly constructed buildings or installation of new production equipment.

Proper Earth Grounding of VFD-Driven Motor Systems:Proper high-frequency (HF) grounding of VFD-driven motor systems is vital to prevent earth-level discontinuities between system components. It is especially critical in applications involving a motor and coupled equipment that are not mounted to a common baseplate. In such cases, effective HF grounding of all system components is necessary to equalize the electric potential between equipment frames and to prevent ground loops between the motor and coupled equipment. Widely recognized as the most efficient path to ground for high frequency currents, high-frequency grounding straps (such as AEGIS® HFGS) are recommended by major motor and drive manufacturers.

Introduction to Bearing Currents




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Frosted Bearing Race

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Failure rates vary widely depending on many factors, but evidence suggests that a significant portion of failures occur in only 3 to 12 months after system startup. All AC and DC motors operated by electronic drives or inverters have the potential of developing this failure in their bearings regardless of motor frame size or horsepower.

These discharges are so frequent (potentially millions per hour) that before long the entire bearing race surface becomes damaged with countless pits known as frosting. A phenomenon known as fluting may occur as well, producing washboard-like ridges across the frosted bearing race. Fluting causes audible noise and vibration and is an indication of a catastrophic failure mode. Regardless of the type of rolling element or raceway damage that occurs, the resulting motor failure often costs thousands of dollars in downtime and equipment failure related repair or replacement costs.

Once these voltages reach a level sufficient to overcome the dielectric properties of the bearing grease, they arc through the motor’s bearings, discharging along the path of least resistance to the motor’s housing. During virtually every VFD switching cycle, induced shaft voltage discharges from the motor’s shaft to the frame via the bearings, leaving a small fusion crater (fret) in the bearing race. When this event happens, temperatures are hot enough to melt the 52100 vacuum degassed bearing steel and severely damage or burn the bearing lubrication.

Because of the high-speed switching frequencies in Pulse Width Modulation (PWM) inverters, variable frequency drives induce capacitively coupled shaft voltages in the electric motors they control. The high frequency switching speed of insulated-gate bipolar transistors (IGBT) used in these drives produce common mode voltages on the motor’s shaft during normal operation through parasitic capacitance between the stator and rotor. These voltages, which can register 10-40 volts peak, are easily measured by touching an AEGIS® Shaft Voltage Probe™ to the motors shaft while the motor is running. The AEGIS-OSC-9100 Shaft Voltage Tester™, a 100 MHz Digital Oscilloscope, allows the voltages to be viewed and recorded for analysis.

Reference: NEMA MG1 Section 31.4.4.3

EDM Electrical Discharge Machining

Pitting Discharge Event

Introduction to Bearing Currents


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1. Inspect the outside and the inside of both bearings and retain a sample of the lubricant for analysis. Look for:

a. Contamination

b. Signs of excessive heat

c. Hardening of grease

d. Abnormal coloration (blackened grease)

e. Excess grease and oil escaping the bearing

2. Cut the outer race into halves. Remove seals or shields prior to cutting.

Follow established safety precautions and use personal protective equipment including eye protection, hearing protection, face shield, gloves and protective clothing.

3. Inspect the grease and any contamination in the bearing.

a. Burnt Grease: Continuous electrical arcing in the motor bearings will often rapidly deteriorate the lubricating capability of the grease and cause bearing race damage. When an arc occurs, the oil component of the grease is heated beyond its temperature capacity.

b. Contamination: In addition to the burnt grease, the arcing causes small metal particles to loosen from the bearing races/balls which are distributed in the grease. These particles are abrasive and will cause the bearing to prematurely wear.

Bearing Inspection

Cutting and inspecting every bearing in motors that come in for repair, especially motors operated on variable frequency drives, will often provide vital information to make the best repair recommendation and thus improve the machine’s overall lifetime performance.

Report template available at: www.est-aegis.com/bearing

About VFD Induced Shaft Voltages and Bearing Currents




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Install new AEGIS® Ring whenever bearings are replaced on an inverter-driven motor.

In addition to using this manual, please refer to other bearing failure analysis experts in order to determine the root cause of failure.

Burnt bearing grease is blackened and oftentimes contaminated with metal particles.

New bearing grease is available in many colors. Blue grease (as shown) is Polyrex EM. It is commonly found in electric motor bearings.

4. Clean the bearing’s components using a degreaser or solvent.

Follow all safety precautions.

5. Inspect for evidence of Electrical Discharge Machining (EDM): EDM damage is millions of microscopic electrical pits that are created when current discharges through the motor’s bearings. The electrical voltage overcomes the dielectric of the bearing lubrication and instantaneously arcs through the inner race, through the rolling elements and to the outer race. The individual pits are usually between 5 and 10 micron diameter.

6. Frosting: This will appear to be a grey discolored line around all or part of the bearing race and may be evident in both the inner and outer race. The discoloration may be caused by mechanical wear or by EDM. Examination under a microscope may be required to determine if the line is EDM or of a mechanical nature. If the motor was operated on a VFD with no bearing protection there is a high likelihood that the frosting is from EDM.

7. Fluting Damage: Identified by a distinctive washboard pattern. Fluting can be identified with the naked eye or with 10x magnification. Fluting is sometimes confused with mechanical bearing damage such as brinelling/false binelling, so care should be taken to correctly assign electrical fluting damage to the pattern observed.



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Motors over 100 HP/75kW

Capacitive EDM Current

50/60 Hz Circulating Current

Capacitive EDM Currents

Capacitive EDM Currents & High Frequency Circulating Currents

High Frequency Circulating Current

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Three Sources of Bearing Current:

There are three sources of bearing currents discussed in this handbook, two of which, Capacitive EDM Current and High Frequency Circulating Current are sourced by the VFD. The third type, which we label 50/60Hz Circulating Current, is mainly in large AC motors that are operated by line voltages at 50/60 Hz.

1. Capacitive EDM Current (from VFD): Capacitive induced voltage from the pulse width switching waveform produced by the variable frequency drive (VFD). This voltage is coupled to the motor’s shaft through parasitic capacitance and can discharge in the motor’s bearings or in the bearings of attached equipment causing electrical discharge machining (EDM).

2. High Frequency Circulating Current (from VFD): High frequency circulating currents may flow due to a high-frequency flux produced by common-mode currents. High frequency inductive circulating currents from VFDs are in the kHz or MHz range and may be present in motors over 100 HP/75 kW. Generally the larger the motor the greater the effects of the high frequency circulating currents.

3. 50/60Hz Circulating Current (from line voltage): 50/60 Hz Sine wave voltage sources in large machines can cause extremely low frequency circulating currents because of the motor’s asymmetrical design and magnetic asymmetries.





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Bearing protection needed to mitigate electrical discharge machining (EDM) damage in bearings.

• When operated by VFD, the power to the motor is a series of positive and negative pulses instead of a smooth sine wave.

• The input voltage is never balanced because the voltage is either 0 volts, positive, or negative with rapid switching between pulses in all three phases.

• The common mode voltage is usually a “square wave” or “6 step” voltage wave form.

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Electric Motors Operating on Line Voltage

• Electric induction motors are designed for operation on 3 phase sine wave power - either 50 or 60 Hz.

• The input power is balanced in frequency, phase (120 degree phase shift) and in amplitude.

• Common mode voltage - the sum of the 3 phases always equal zero volts when properly balanced.

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Note: Bearing protection generally not needed except for large frame motors.



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Common Mode Supply 480vAC

• The pulses to the motor from the VFD create a capacitively coupled common mode voltage on the motor’s shaft.

• Creates electrical bearing discharge currents.

• Voltages are measurable with an AEGIS® Shaft Voltage Tester™ Digital Oscilloscope (AEGIS-OSC-9100) and AEGIS® SVP Shaft Voltage Probe™ Tip.


An Electric Motor works like a Capacitor

• Voltages arc through the bearings, and electrical discharge machining (EDM) creates thousands of pits in the bearing’s race.

• Bearings degrade, resulting in increased friction and noise

• Eventually, the rolling elements can cause fluting damage to the bearing races

• Bearing lubrication/grease deteriorates, is burnt and fails

• Potential for costly unplanned downtime

Voltage Arcs through the Bearing

AEGIS-OSC-9100





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High Frequency Circulating Currents on VFD Driven Motors

Induced by the magnetic flux imbalance around the motor shaft from the stator windings, these currents circulate through the motor bearings. High frequency circulating currents can be a problem in large AC motors over 100 HP (75 kW) and DC motors over 10 HP (7.5 kW).

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Along with the high frequency circulating currents you will also have the capacitive EDM current which can travel down the shaft to attached equipment and cause electrical discharge machining (EDM) in the equipment’s bearings or gearing. Therefore it is important when considering high frequency circulating currents to also mitigate capacitive EDM current with the AEGIS® Shaft Grounding Ring to divert the voltages away from the drive end motor bearing and/or the attached equipment to ground.

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Best Practice to Protect from Both Capacitive EDM Current and High Frequency Circulating Current

The recommended best practice is to stop the high frequency circulating currents by isolating or insulating the non-drive end of the motor (NDE) and to install an AEGIS® Shaft Grounding Ring on the drive end (DE), on the opposite side from the insulation, for capacitive EDM current. This practice will protect both the motor’s DE bearing and the attached equipment.



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Motors over 100 HP/75kW


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High Frequency Circulating Current

Sinusoidal voltage sources can cause low frequency circulating currents in large machines due to the motor’s asymmetrical design. 50/60Hz operation can result in circulating currents due to motor magnetic asymmetries.

a. Usually present in very large machines only.

b. Circulate through the motor bearings, shaft to frame.

Best Practice: Interrupting the circulating current is the best approach to mitigating potential bearing damage.

Ref: NEMA MG1 Part 31.4.4.3

50/60 Hz Circulating Current - Low Frequency Circulating Currents from 50/60Hz Line Voltage in Motors over 500 Frame

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The AEGIS® Ring conducts harmful shaft voltages away from the bearings to ground. Voltage travels from the shaft , through the conductive microfibers, through the housing of the ring, through the hardware (or conductive epoxy) used to attach the ring to the motor, to ground.

The AEGIS® HFGS (High-Frequency Ground Strap) is a braided cable used to lower the impedance between the motor’s frame and earth ground. Secure one end to motor and the other end to earth ground.

All paths must be conductive. When rebuilding a motor, overspray on the end bracket must be removed to ensure a conductive path to ground. Clean all fits. Use an Ohm meter to check resistance.

Grounding Path





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AEGIS® High-Frequency Ground StrapEnsures Reliable Bond Between Motor Frame and System Ground

The AEGIS® Ring protects the motors bearings and prevents fluting and bearing failure and the High-Frequency Ground Strap (HFGS) ensures the reliable path to system ground.

Proper high-frequency (HF) grounding of VFD-driven motor systems is vital to prevent earth-level discontinuities between system components. It is especially critical in applications involving a motor and coupled equipment that are not mounted to a common baseplate. In such cases, effective HF grounding of all system components is necessary to equalize the potential between equipment frames and to prevent ground loops between the motor and coupled equipment.

Widely recognized as the most efficient path to ground for high frequency currents, grounding straps are recommended by major motor and drive manufacturers. AEGIS® High-Frequency Ground Straps ensure a very-low impedance path to ground from the frame of the motor for the high-frequency currents generated by VFD. Used in conjunction with AEGIS® Rings, which provide a safe path for damaging VFD-induced currents away from the motor’s bearings to the motor’s frame, AEGIS® HFGS bonding straps complete the path from motor’s frame to system ground.

High-Frequency Ground Straps are designed with a tinned hole on one end (size based on NEMA/IEC frame) and a ring terminal on the opposite end to fit a 5/16” [8mm] screw. Standard lengths are available in 12” [305mm] and 24” [610mm] increments. Also available is a universal strap which includes a ring terminal on both ends. Longer straps and other terminations are available upon request. See page 53 for parts list.

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3 Motor foot/facility ground to VFD ground bus

4Motor frame to metal conduit; VFD ground to metal conduit

Motor Grounding


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AEGIS’s patented, protective FiberLock™ channel locks the ring’s conductive microfibers securely in place around the motor shaft, allowing them to flex without breaking. The channel also helps protect the fibers from excessive dirt, oil, grease, and other contaminants.

In severe duty environments install the AEGIS® Rings inside the motors or add a protective O-ring or V-slinger against the AEGIS® Ring’s face (see page 33). For large motors or medium voltage motors specify the AEGIS® PROSLR (page 23) which incorporates an O-ring barrier built into the shaft grounding ring to protect against dirt or debris.

Patented FiberLock™ Channel Secures and Protects Fibers

Designed with specific mechanical and electrical characteristics that minimize wear and maintain conductivity, AEGIS® microfibers will last for the life of the motor. Based on wear of less than 0.001” [0.025mm] during 10,000 hours of testing, proven to withstand over 200,000 hours of continuous operation.

Specially Designed Microfibers Flex Without Breaking

The AEGIS® Shaft Grounding Ring’s unique design features hundreds of thousands to millions of specially engineered conductive microfibers that encircle the motor shaft. With so many electrical transfer points the ring provides continuous electrical contact, whether its fibers are physically touching the shaft or not. This patented “nanogap” technology enables both contact and noncontact shaft grounding — 100% of the time.

Proprietary Conductive Microfibers Last for the Service Life of the Motor

The AEGIS® Shaft Grounding Ring’s patented Nanogap Technology ensures effective electrical contact even when physical contact is broken. Only AEGIS® Nanogap Technology provides both maintenance-free contact and noncontact bearing protection for the normal service life of the motor’s bearings as well as the most reliable operation of any shaft grounding technology.

AEGIS® Shaft Grounding Ring uses Revolutionary Nanogap Technology

• Unique contact/non-contact design• 360 degrees circumferential conductive microfiber ring• Multiple row design – greatest reliability• Ensures unmatched shaft grounding and performance

AEGIS® Shaft Grounding Rings Provide Both Contact and Noncontact GroundingThe Only Product of its Kind

Wear-to-Fit™ DesignThrough our patented design, AEGIS® conductive microfibers are a wear-to-fit design which ensures that the fibers don’t “wear out” during the bearing’s life They exhibit minimal wear with the ability to flex without breaking. During the life of the ring the minimal wear characteristics ensure that the fibers only wear to the exact diameter of the motor’s shaft and no further, maintaining the nanogap contact which allows the AEGIS® Shaft Grounding Rings to continue to operate effectively and protect the motor’s bearings. In testing, they were proven to withstand 2 million direction reversals (to 1800 RPM) with no fiber fatigue or breakage.

AEGIS® Technology




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The chart below compares the design and performance characteristics of AEGIS® Rings to those of conventional and discrete-point grounding brushes that work only through contact with the motor shaft. Due to its patented design and proprietary conductive microfibers, the AEGIS® Ring maintains electrical contact with the motor shaft even if mechanical contact is broken. No other shaft grounding brush provides such exceptional bearing protection.

AEGIS® Shaft Grounding Ring vs. Contact-Only Brush

This process results from the cascading effect of secondary electrons released by collisions and the impact ionization of gas ions accelerating across gaps greater than 5 μm. This ionization creates negative and positive ions which neutralize the shaft voltage.

Townsend Avalancheof Gaseous Ions

Field emission is a form of quantum tunneling whereby electrons move through a barrier in the presence of a high electric field. It provides grounding across gaps of 2 nm to 5 μm. The electric field from the shaft voltage creates the conditions for the AEGIS® ring fibers to take advantage of field emission electron transfer from the shaft.

Field Emissionsof Electrons

This mechanism is based on the ability of electrons to “tunnel” across an insulating barrier, and works for gaps smaller than 2 nm.

Tunnelingof Electrons

At any point in time, the AEGIS® microfibers are in mechanical contact with the shaft and those that aren’t are in nanogap proximity due its unique design. Thanks to the patented Electron Transport Technology™, all of the ring’s fibers remain in electrical contact with the motor shaft providing unmatched grounding 100% of the time. This technology ensures electrical contact for the life of the motor through mechanical contact and three simultaneous nanogap noncontact current transfer processes. These processes ensure effective grounding regardless of the motor’s speed. No other product works with and without contacting the motor shaft to provide the long term and maintenance-free bearing protection of the AEGIS® Ring.

Ensures Unmatched Grounding With or Without Shaft Contact

AEGIS® Technology

Performance Characteristic AEGIS® Ring Contact-Only Brush

Continuous circumferential ring design Yes No

Contact and Noncontact electrical shaft grounding Yes No

Protective fiber channel Yes No

Ultra-low wear fibers / wear-to-fit fiber design Yes No

Maintenance-free Yes No

Effective in presence of dust, dirt, oil, and grease Yes No


Patented Technology

6 rows of Conductive MicroFiber

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AEGIS® PRO Series Current Capability Chart

Curr

ent

(am

ps)

MEDIUM VOLTAGE MOTORS AND LOW VOLTAGE MOTORS > 500HP (375kW)

Recommended Technology: AEGIS® PRO Series

Recommend isolation of one bearing and AEGIS® PRO Series on the opposite bearing.

AEGIS® SGR for Low Voltage and AEGIS® PRO Series for Medium Voltage Motors

Description:

• Design Type: AEGIS® SGR

• Circumferential Conductive MicroFiber rows in FiberLock™ Channel

• Rows of fiber: 2

• Fiber overlaps shaft 0.030” [0.76mm]

• OAL: 0.295” [7.5mm]

• OD: listed in AEGIS® Parts List

Mounting:

• Internal or External

• Select based on shaft diameter

• Split and Solid versions available

• Custom brackets optional

Description:

• Design Type: AEGIS® PRO Series




• Varies by PRO Ring style

• OD: Shaft + (refer to drawing)

Mounting:

• Internal or External

• Select based on shaft diameter

• Split and Solid versions available

• Custom brackets optional

LOW VOLTAGE MOTORS UP TO 500HP (375kW)

Supply voltage: 600 VAC or lessRecommended Technology: AEGIS® SGR

Motors over 100 HP - recommend isolation of one bearing and AEGIS® SGR on the opposite bearing.

AEGIS® SGR Current Capability Chart

0

10

20

30

40

50

60

70

AEGIS® Shaft Grounding RingHF Current Discharge Capability (amps at 50 watts)

0.5” [12.5mm] 1” [25mm] 2” [50mm] 4” [100mm] 8” [200mm]

0

50

100

150

200

250

AEGIS® PRO SeriesHF Current Discharge Capability (amps at 50 watts)

2” [50mm] 4” [100mm] 8” [200mm] 16” [400mm] 32” [800mm]

Curr

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(am

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AEGIS® Technology




Patented Technology

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Manufacturer’s Specification

AEGIS® Technology

Fiber Flexibility AEGIS® Rings are constructed with patented AEGIS® FiberLock™ channel to allow conductive micro fibers to bend and flex within their elastic design limits. Multiple rows of fiber are distributed 360 degrees inside the FiberLock™ channel to provide maximum shaft surface contact. Fiber length is designed with an optimal shaft overlap.

Fiber wear Usually less than 0.001” [0.03mm] in 10,000 hours. Fiber wear length is designed for expected life of 200,000+ hours based on testing. Wear rate may vary depending on conditions in individual applications. Fibers retain contact/noncontact function.

Friction Little or no frictional axial or radial fiber pressure applied to shaft. Extremely light contact only. Designed for minimal friction with no reduction in motor performance.

Shaft Surface Finish Ra 130 micro-inch finish or better.

AEGIS® Shaft Grounding Ring Maintenance Requirements

The AEGIS® Ring does not require maintenance. The shaft must remain conductive for shaft current discharge.

Replacement Install new AEGIS® Ring whenever bearings are replaced on inverter-driven motors.

Oil and Grease on Motor Shaft Small amounts of oil and/or grease are acceptable if the shaft surface remains conductive. Fibers are designed to maintain contact with the motor shaft and “sweep” oil away from surface.

Dirt/dust Small amounts of dust and/or small particles are acceptable. Fibers “sweep” particles from shaft surface during operation. Shaft surface must remain conductive.

Directional rotation Motor may be operated in clockwise or counter clockwise rotation. Motor may change directional rotation without limitations.

Eccentricity 0.010” [0.25mm] Total Indicator Runout in area where AEGIS® Ring is installed.

Maximum surface rate/RPM No Maximum rating - There is no theoretical RPM limit as there is virtually no frictional contact with the shaft at high RPM. Verify specific applications with AEGIS® engineering.

Maximum temperature rating 410°F (210°C) - Verify application specific temperatures with AEGIS® engineering.

Minimum temperature rating -112°F (-80°C) - Verify application specific temperatures with AEGIS® engineering.

Humidity 0 to 90% - Verify application specific acceptable humidity with AEGIS® engineering

Surface Conductivity Coating the shaft with AEGIS® Colloidal Silver Shaft Coating (CS015) will enhance surface conductivity and help prevent rust/corrosion.

RoHS Test Results

Directive 2002/95/EC for the Restriction of the use of certain Hazardous Substances in electrical and electronic equipment applies

All materials used in manufacture of AEGIS® Rings are in compliance with Directive 2002/95/EC, Restriction of the use of certain Hazardous Substances in electrical and electronic equipment. No RoHS banned substances are present in excess of the maximum concentration values (MCV).

1. Following substances were found to be less than 0.1% by weight in homogeneous materials (required by RoHS directive):

Lead (Pb)Mercury (Hg)Hexavalent chromium (Cr(VI))Polybrominated biphenyl (PBB)Polybrominated diphenyl ether (PDPE)

2. Following substance is less than 0.01% by weight in homogeneous materials (required by RoHS directive):

Cadmium (Cd)

Note: Request RoHS Certification Letter from [email protected] or call 1-866-738-1857

Hazardous areas Not certified for external mounting in hazardous environments (Class 1 Division 1, Division 2 or Class 1 Zone 1, Zone 2). AEGIS® Shaft Grounding Rings may be installed inside an Explosion Proof enclosure per IEEE Std 303™-2004 or inside an XP motor.

CE and UL requirements AEGIS® Rings are classified as a “component” and as such are not subject to the requirements of any Directive. The application of CE or UL Mark is not applicable to this component.


Patented Technology

Stator

RotorShaft

Earth Ground

VFDDrivenEquipment

AEGIS® SGR-internal or external (shown) installation

AEGIS® CS015


Protects motor bearings and bearings in attached equipment.

Install AEGIS® Ring on opposite end from insulation

Stator

RotorShaft

VFDDrivenEquipment

Sleeve

InsulatedBearing

AEGIS® CS015


Earth Ground

AEGIS® SGR-internal (shown)

or external installation

Low Voltage Motors:

Low Voltage Motors:

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For Technical Support: [email protected] or call 1-866-738-1857

For horizontally mounted motors with single row radial ball bearings on both ends of the motor:

• Non-Drive end: Bearing housing must be isolated with insulated sleeve or coating or use insulated ceramic or hybrid bearing to disrupt circulating currents.

• Drive end: Install one AEGIS® Shaft Grounding Ring.

• AEGIS® Ring can be installed internally on the back of the bearing cap or externally on the motor end bracket.

• Use AEGIS® Colloidal Silver Shaft Coating (PN# CS015) on motor shaft where fibers touch.

Product recommendation: � Low Voltage Motors up to 500HP:

AEGIS® SGR � Low Voltage Motors over 500HP:

AEGIS® PRO Series

Motors Greater than 100 HP (75 kW)

Follow all safety precautions. GHS SDS available for download at www.est-aegis.com

General recommendations: For induction motors operated on PWM IGBT VFD’s either foot mounted, C-face or D-flange mounted motors with single row radial ball bearings on both ends of the motor. Motors may be installed either horizontally or vertically in the customer’s application.

• Install one AEGIS® SGR Bearing Protection Ring on either the drive end or the non-drive end of the motor to discharge capacitive induced shaft voltage.

• AEGIS® SGR may be installed either internally or externally.


Product recommendation: AEGIS® SGR

Motors up to and including 100 HP (75 kW)

AEGIS® Shaft Grounding Best Practices-Low Voltage Motors




Patented Technology

Stator

RotorShaft

VFDDrivenEquipment

Sleeve

Insulated Sleeves or Ceramic Bearings on

DE and NDE

AEGIS® CS015


Earth Ground



Stator

RotorShaft

VFDDrivenEquipment

orBelted

Application

Sleeve

Insulate Cylindrical Roller Bearing

AEGIS® SGR-internal (shown) or external installation

AEGIS® CS015


Earth Ground

STOP

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AEGIS® Ring must be installed opposite side of insulation.

Note: Insulating the DE cylindrical roller bearing is preferred. However, if this is not possible, then insulate the NDE bearing instead and install an AEGIS® Ring on the DE (cylindrical roller bearing side).

• Cylindrical Roller Bearing, Babbitt, or Sleeve bearing: Bearing housing should be isolated or use insulated bearing.

• Motors with insulated cylindrical roller bearing DE: Install AEGIS® Shaft Grounding Ring on opposite drive end (NDE).


• Colloidal Silver Shaft Coating PN CS015 is required for this type of application.

Product recommendation: � Low Voltage Motors: AEGIS® SGR � Low Voltage Motors over 500HP:

AEGIS®PRO Series

Motors with Cylindrical Roller, Babbitt or Sleeve Bearings

Bearings in attached equipment may be at risk from VFD induced shaft voltage unless AEGIS® Shaft Grounding is installed.

• Install one AEGIS® Shaft Grounding Ring, drive end preferred, to protect bearings in attached equipment (gearbox, pump, fan bearing and encoder, etc...).




AEGIS®PRO Series

Motors Where Both Bearings are Insulated - Any HP/kW


Low Voltage Motors:

Low Voltage Motors:

AEGIS® Shaft Grounding Best Practice-Low Voltage Motors


Patented Technology

Stat

or

Roto

rSh

aft

VFD

Earth Ground

Driven Equipment




AEGIS® CS015St

ator

Roto

rSh

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VFDSleeve

Isolate

Driven Equipment




AEGIS® CS015

Earth Ground

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• Upper Bearing: Bearing journal must be isolated or insulated ceramic or hybrid ceramic bearing installed.

• Bottom Bearing: Install one AEGIS® Shaft Grounding Ring.




AEGIS®PRO Series

Vertical Solid Shaft Motors Greater than 100 HP (75 kW)

Follow all safety precautions. MSDS available for download at www.est-aegis.com

• Lower Bearing: Install one AEGIS® SGR Bearing Protection Ring.

• AEGIS® SGR can be installed internally on the back of the bearing cap or externally on the motor end bracket.



Vertical Solid Shaft Motors up to and including 100 HP (75 kW)

Low Voltage Motors:

Low Voltage Motors:





Patented Technology

Thrust Bearing

GuideBearing

Roto

r

Stat

or

Hollow Shaft

Bearing Carrier

Hea

d Sh

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AEGIS® Ring

ShaftCurrents

Earth Ground


AEGIS® CS015



VFD

Driven Equipment

Thrust Bearing

GuideBearing

Roto

r

Stat

or

Hollow Shaft

InsulatedBearing Carrier

Hea

d Sh

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AEGIS® Ring

ShaftCurrents

Earth Ground


AEGIS® CS015



VFD

Driven Equipment

MOT

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• Upper Bearing: Bearing carrier must be isolated or insulated ceramic or hybrid ceramic bearing installed.

• Lower Bearing: Install one AEGIS® Shaft Grounding Ring.

• AEGIS® Ring can be installed internally on the back of the bearing cap.



AEGIS®PRO Series

Vertical (Hollow & Solid Shaft) Thrust Handling Motors Greater than 100 HP (75 kW)

Note: For external installation, the AEGIS® Ring must run on the motor or pump shaft at the lower bearing. Ring must not be mounted around the steady bushing.

Upper bearing may be isolated with insulated bearing carrier for added protection.

• Lower Bearing: Install one AEGIS® SGR Bearing Protection Ring.

• AEGIS® SGR can be installed internally on the back of the bearing cap.



Vertical (Hollow & Solid Shaft) Thrust Handling Motors up to and including 100 HP (75 kW)

Low Voltage Motors:

Low Voltage Motors:



Patented Technology

The AEGIS® PRO Series design provides reliable shaft grounding for medium voltage applications, generators and turbines to divert harmful shaft voltages to ground and extend bearing life. Install the AEGIS® PRO on the DE and insulate the bearing on the opposite end (NDE) for best results. Large motors and generators often have much higher induced shaft voltages and bearing currents. The six circumferential rows of conductive microfiber provide the extra protection for these high current applications.

Generators may experience current surges which can cause electrical arcing in their bearings and equipment. The AEGIS® PRO Rings have a high current capable design and can discharge these currents.

Designed for:

Large frame low-voltage motors: 500 HP (375kW) or greater

Medium-voltage motors

DC motors: 300 HP or greater

Specifications:

• Available in shaft diameters from 2.5” to 30” [63.5mm to 762mm]




• Ships with CS015 AEGIS® Colloidal Silver Shaft Coating

Options:

• Solid and split ring designs

• Monitoring ring option for voltage monitoring

• Stock brackets and stand-off kits

• Custom brackets available

Sleeve

InsulatedBearing

AEGIS® PRO Series

Stator

RotorShaft

VFDDrivenEquipment

AEGIS® PROSLwith Universal Brackets

AEGIS® Universal Brackets

AEGIS® PROSL

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AEGIS® PRO Series - Shaft Grounding RingsFor Maximum Bearing Protection

External Installation

Stator

RotorShaft

VFDDrivenEquipment

Sleeve

InsulatedBearing

AEGIS® PRO Serieson bearing cap

InternalInstallation

AEGIS® Shaft Grounding Best Practices-Medium Voltage Motors




Patented Technology

O-rings

AEGIS® PROSL

AEGIS® PROMAX

AEGIS® PROSLR

The AEGIS® PROMAX is designed for installation on the most critical and largest motors, generators and turbines. Scalable to any shaft diameter over 15.75” [400mm], this high current capable AEGIS® PROMAX Shaft Grounding Ring is custom engineered for each application to ensure the best bearing protection possible.

SpecificationsDesigns: Split Ring onlyShaft Dia: 15.75” to 30” [400mm to 762mm]OD: Shaft Dia + 3.0” [76.2mm]OAL: 1.875” [47.62mm] assembled with mounting screwsMounting: Supplied with (4) M8 x 1.25 x 50 Socket Head Cap Screws

for bolt through mountingCustom brackets available upon request

The AEGIS® PROSL is a high current capable AEGIS® PRO Series Bearing Protection Ring for large motors, generators and turbines operated by VFDs. The slim design and flexible installation options allow for adaptation to virtually all large motors.

SpecificationsDesigns: Solid, Split and Press FitShaft Dia: 2.5” to 15.75” [63.5mm to 400mm]OD: Shaft Dia + 1.86” [47.24mm]OAL: 0.650” [16.51mm] MAX assembled with mounting screwsMounting: Supplied with screws for bolt through mounting English: 8-32 x 1” Flat Head Cap Screws Metric: M4 x .7 x 25mm Flat Head Cap Screws

Optional Universal Brackets for easy mounting.

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AEGIS® PRO Series - Shaft Grounding Ring


Severe Duty motors are operated in general processing industry applications requiring protection from severe environmental operating conditions - often where there is debris, powder, dirt, liquids, lubricants or other contaminants. For these applications the AEGIS® PROSLR incorporates an O-ring dust and debris barrier which will prevent ingress of materials that could interfere with the contact of the conductive microfibers to the motor’s shaft.Note: When the AEGIS® PROSLR is installed inside the motor the O-ring barrier will prevent grease from clogging the fibers in an over-lubricated condition.

SpecificationsDesigns: Solid and SplitShaft Dia: 2.5” to 15.75” [63.5mm to 400mm]OD: Shaft Dia + 1.86” [47.24mm]OAL: 0.775” [19.68mm] assembled with mounting screwsMounting: Supplied with screws for bolt through mounting English: Solid Ring 8-32 x 1” FHCS, Split Ring 8-32 x 1.25” FHCS Metric: Solid Ring M4 x .7 x 25mm FHCS, Split Ring M4 x .7 x 31mm FHCS



Patented Technology

AEGIS® PROSL Universal BracketsKit includes brackets, four different spacer lengths and hardware for each. See parts list for details (page 51).

AEGIS® PROMR

The AEGIS® PROMR “monitoring ring” combines the AEGIS® PROSL with an additional isolated SGR ring that can be used as a monitoring device. The PROSL channels the voltages and currents safely to ground while the monitoring SGR ring measures voltage on the shaft and is not grounded. A phenolic plate between the 2 rings is used to isolate the monitoring ring.

For shaft diameter of 2.5” to 15.75” [63.5mm to 400mm].

Designs: Solid and SplitOD: Shaft Dia + 1.86” [47.24mm]OAL: 1.312” [33.32mm] assembled with mounting screwsMounting: Supplied with screws for bolt through mounting English Screws: 8-32 x 1” Flat Head Cap Screws Metric Screws: M4 x .7 x 25mm Flat Head Cap Screws


Bearing Cap Mounting Custom Mounting BracketsCustom Split Mounting Platewith tie bars

AEGIS® PROSL

Monitoring Ring

Phenolic Insulation

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Optional Mounting Brackets for AEGIS® PRO Series For AEGIS® PROSL, PROSLR, PROMR

AEGIS® Shaft Grounding Best Practices -Medium Voltage Motors

AEGIS® PRO Series Shaft Grounding Ring

Custom Brackets/Installation ExamplesContact our Engineering Team for special mounting applications.




Patented Technology


Sleeve

InsulatedBearing

Stator

RotorShaft

VFDDrivenEquipment


AEGIS® CS015AEGIS®PRO Series-external (shown) or internal installation

For horizontally mounted motors with single row radial ball bearings on both ends of the motor:


• Drive end: Install one AEGIS® Shaft Grounding Ring.



Product recommendation: AEGIS® PRO Series

Motors Greater than 100 HP (75 kW)

Sleeve

InsulatedBearing

Stator

RotorShaft

VFDDrivenEquipment


AEGIS® CS015AEGIS® PRO Series-external (shown) or internal installation Insulated Sleeves or

Ceramic Bearings on DE and NDE

STOPBearings in attached equipment may be at risk from VFD induced shaft voltage unless AEGIS® Shaft Grounding is installed.

• Install one AEGIS® Shaft Grounding Ring, drive end preferred, to protect bearings in attached equipment (gearbox, pump, fan bearing and encoder, etc...).




Motors Where Both Bearings are Insulated - Any HP/kW


Medium Voltage Motors:

MediumVoltage Motors:

MOT

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Patented Technology

Stator

RotorShaft

VFDDrivenEquipment

orBelted

Application

Sleeve

Insulate Cylindrical Roller Bearing

Earth Ground

AEGIS® CS015 AEGIS®PRO Series-internal (shown) or external installation


AEGIS® Ring must be installed opposite side of insulation.

Note: Insulated DE bearing is preferred. However, if this is not possible then insulate the NDE bearing instead and install an AEGIS® Ring on the DE (cylindrical roller bearing side).

• Cylindrical Roller Bearing, Babbitt, or Sleeve bearing: Bearing housing should be isolated or use insulated bearing.

• Motors with insulated cylindrical roller bearing DE: Install AEGIS® Shaft Grounding Ring on opposite drive end (NDE).




Motors with Cylindrical Roller, Babbitt or Sleeve Bearings

Stat

or

Roto

rSh

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VFDSleeve

Isolate

Earth Ground

Driven Equipment


AEGIS® PRO Series-internal (shown) or

external installation

AEGIS® CS015

• Upper Bearing: Bearing journal must be isolated or insulated ceramic or hybrid ceramic bearing installed.

• Bottom Bearing: Install one AEGIS® Shaft Grounding Ring.




Vertical Solid Shaft Motors Greater than 100 HP (75 kW)



MOTOR

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Patented Technology

• Upper Bearing: Bearing carrier must be isolated or insulated ceramic or hybrid ceramic bearing installed.

• Lower Bearing: Install one AEGIS® Shaft Grounding Ring.

• AEGIS® Ring can be installed internally on the back of the bearing cap.



Vertical Hollow Shaft Motors Greater than 100 HP (75 kW)

All AEGIS® PRO Series Rings are custom-manufactured to the measurements provided

NEMA ‘U’shaftdiameter

Stepdiameter

Distance from mounting faceto end of shaft step

Mounting faceouter diameter

Mounting faceinner diameter

Distance from mountingface to end of shaft

Distance from mountingface to shaft key

Distance from mounting faceto attached equipment

Measure dimensions to: Inches: 3 decimal places / Metric: 2 decimal places

Thrust Bearing

GuideBearing

Driven Equipment

Roto

r

Stat

or

Hollow Shaft

InsulatedBearing Carrier

Hea

d Sh

aft

AEGIS® Ring

ShaftCurrents

Earth Ground


AEGIS® CS015

AEGIS® PRO Series-internal (shown)



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Patented Technology

Capacitive induced shaft voltage before bearing current discharge through the bearings. Square wave from DC SCR drive.

Voltage 324

No Shaft GroundingVolts: 65.2 V pk-pkBearing discharges (EDM)

Voltage 65.2

AEGIS® Shaft GroundingVolts: 1.92 V pk-pkDischarge through AEGIS® Shaft Grounding Ring

Voltage 1.92

DC Motor - Before and After Testing with AEGIS® Installed350 HP DC Motor - DC Inverter Drive

AEGIS® Shaft Grounding for DC Motors

AEGIS® PRO Series Shaft Grounding Ring for Large DC Motors 300 HP (225 kW) and GreaterLarge DC motors over 300 HP (225 kW) have higher shaft voltages and currents and require the AEGIS® PRO Series installed on the DE of the motor. In addition, the NDE bearing should have insulation to prevent circulating currents.

MOTOR

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AEGIS® Shaft Grounding Best Practices - DC Motors

DC motors when operated on drives may also require bearing protection from induced shaft voltages. Capacitive induced shaft voltages may be hundreds of volts peak-to-peak and depending on the drive will increase in amplitude as the speed of the motor is increased. If there is no shaft grounding ring installed, the voltages may discharge through the bearings causing EDM pitting and fluting failure. In addition, circulating currents from magnetic dissymmetry may exist on DC motors over 10 HP (7.5 kW) (1). This would necessitate the insulation of the NDE bearing, with an AEGIS® Shaft Grounding Ring installed on the opposite end of the motor.

(1) EASA web seminar: Dealing with Shaft and Bearing Currents, Thomas H. Bishop, P.E., Electrical Apparatus Service Association, January 19, 2011

Recommendation: Install AEGIS® SGR on the DE of the DC motor for all motors up to 300 HP (225 kW). For DC motors over 10 HP (7.5 kW), also insulate the NDE bearing.




Patented Technology


• Drive end: Install one AEGIS® Shaft Grounding Ring to discharge induced shaft voltage.

• AEGIS® Ring should be installed internal to the motor if possible but may also be attached externally to the motor’s end bracket.


Product recommendation: � DC motors from 10HP to 300HP:

AEGIS® SGR � DC motors over 300HP: AEGIS®PRO

Series

DC Motors up to and including 10 HP (7.5 kW) - Operated on DC Inverter(1)

• Install one AEGIS® SGR Bearing Protection Ring on either the drive end or the non-drive end of the motor to discharge induced shaft voltage.

• AEGIS® SGR should be installed internal to the motor if possible but may also be attached externally to the motor’s end bracket.



DC Motors Greater than 10 HP (7.5 kW) - Operated on DC Inverter

Follow all safety precautions. MSDS available for download at www.est-aegis.com

Magnets

RotorShaft

DC

Mot

or In

vert

erDrivenEquipment

Sleeve

InsulatedBearing

Commutator

AEGIS® CS015


Earth Ground



Magnets

RotorShaft

DC

Mot

or In

vert

erDrivenEquipment Commutator

AEGIS® CS015


Earth Ground



DC Motors:

DC Motors:

(1) EASA web seminar: Dealing with Shaft and Bearing Currents, Thomas H. Bishop, P.E., Electrical Apparatus Service Association, January 19, 2011

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AEGIS® Shaft Grounding Best Practices - DC Motors


Patented Technology

Rotor

BearingRetainer

EndBracket

Shaft

AEGIS®SGR

Photo courtesy of Independent Electric

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Epoxy Mounting – Internal

AEGIS® Conductive Epoxy was specially developed and tested to stringent vibration and pull test requirements to ensure a strong and reliable long term adhesive bond.

Do not use a substitute epoxy as only the AEGIS® EP2400 has been tested and approved for AEGIS® ring installation.

Common AEGIS® Ring installation internal to the motor is on the motor’s bearing retainer. Installation can be done with bolt through hardware or AEGIS® Conductive Epoxy.

For epoxy installation, bearing retainer must be clean & free of any coatings, paint, or other nonconductive material where AEGIS® SGR will be mounted. This is the discharge path to ground therefore metal to metal contact is essential.

In some motors it may be desirable to attach an additional machined spacer to locate the ring further away from the bearing grease cavity.

A grease seal may be added to reduce grease ingress to the fibers.

Do not use non-conductive thread-lock

Use EP2400 Conductive Epoxy if thread lock is needed to secure the screws in place.

Bolt-through installation:• Press into bearing retainer• Press into custom bracket

Drill/tap holes per AEGIS® Ring drawing location

• Flat head cap screws• Socket head cap screws/lock washer

Press Fit Installation:• Press into bearing retainer• Press into custom bracket

Bore Specification: 0.002” – 0.004” interference [0.05 mm - .10 mm]English: Ring OD tolerance +0 / -0.001” Bore tolerance +0.001 / -0”Metric: Ring OD tolerance +0 / -0.025 mm Bore tolerance +0.025 / -0 mm

Follow all safety precautions. GHS SDS for CS015 and EP2400 available for download at www.est-aegis.com

Follow AEGIS® best practices for motor shaft preparation and ring installation. Use AEGIS® Colloidal Silver Shaft Coating when installing AEGIS® rings to enhance the shaft conductivity and help prevent oxidation.

AEGIS® Shaft Grounding Rings are ideally installed on the inside of the motor to provide protection from ingress of dirt and dust. Motor manufacturers commonly use this installation as a best practice in stock catalog motors equipped with AEGIS® rings.

AEGIS® Installation - Internal

AEGIS® Installation and Shaft Preparation




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AEGIS® PROSLR

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Epoxy Mounting – External

Motor end bracket must be clean & free of any coatings, paint, or other nonconductive material where AEGIS® SGR will be mounted using conductive epoxy. This is the discharge path to ground therefore metal to metal contact is essential.

Curing can be achieved in 4 hours at or above 75° F (24°C). For faster curing times, maximum conductivity and adhesion, heat the bond to between 150°-250° F (66°-121° C) for 10 minutes and allow to cool.

Pot-life is approximately 10 minutes at 75° F (24° C).

AEGIS® Conductive Epoxy was specially developed and tested to stringent vibration and pull test requirements to ensure a strong and reliable long term adhesive bond.

Do not use a substitute epoxy as only the AEGIS® EP2400 has been tested and approved for AEGIS® ring installation.

Do not use non-conductive thread-lock

Use EP2400 Conductive Epoxy if thread lock is needed to secure the screws in place.

Bolt-through installation into:• End Bracket• Custom Bracket

Drill/tap holes per AEGIS® Ring drawing location

• Flat head cap screws• Socket head cap screws/lock washer

Large Severe Duty AC and DC Motors: These motors are operated in severe environmental conditions where there is debris, powder, dirt, liquids, lubricants or other contaminants which can collect around the shaft of the motor. For these applications the AEGIS® PROSLR incorporates an O-ring dust and debris barrier to prevent ingress of these materials. See page 23.

Note: Some seal manufacturers such as Garlock and Flowserve provide bearing isolators with AEGIS® Rings installed inside.

Standard bracket or uKIT bracket Installation:

1. Standard Brackets (3 or 4 depending on ring size)

2. uKIT includes various bracket options

3. Custom brackets availableTo view product line or download the AEGIS® Catalog visit www.est-aegis.com

Follow AEGIS® best practices for motor shaft preparation and ring installation. Use AEGIS® Colloidal Silver Shaft Coating when installing AEGIS® rings to enhance the shaft conductivity and help prevent oxidation.

An O-ring or V-slinger may be installed against the AEGIS® Ring to help prevent excessive ingress of dirt, dust or liquid.

AEGIS® Shaft Grounding Rings may be installed on the outside of the motor but care must be taken to protect the ring from excessive ingress of dirt and dust.

AEGIS® Installation - External

2. 3.1.



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Colloidal SilverShaft Coating

PN# CS015

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Colloidal Silver Shaft Coating (CS015) is recommended for all applications (we don’t recommend any substitutions). The silver enhances the conductivity of the shaft and also lessens the amount of corrosion that can impede the grounding path.

Treating the shaft of the motor prior to installing the AEGIS® Ring:1. Shaft must be clean and free of any coatings, paint, or other

nonconductive material. The shaft must be clean to bare metal.2. If possible, gently warm the shaft when the AEGIS® CS015 will be

applied. This helps the CS015 cure faster. Allow CS015 to come to room temperature prior to opening.

3. Apply a thin, uniform coat of the AEGIS® Colloidal Silver Shaft Coating to the area where the AEGIS® microfibers will be in contact with the motor shaft. Apply all around the shaft. Wait for the first coat to dry to a tack free surface. Drying can be accelerated with the use of gentle heat from a heat gun, but don’t exceed 200°F (93°C) while curing.

4. Apply a 2nd thin, uniform coat of CS015. 5. Allow CS015 to dry to a tack free surface before installing the AEGIS® Ring.6. Allow the CS015 to cure completely before running the motor. The

coating will cure at room temperature in 16-20 hours or in about 60 minutes at 200°F (93°C).

Follow all safety precautions. GHS SDS for CS015 available for download at www.est-aegis.com

Ohms test:

Place the positive and negative meter leads on the shaft at a place where the microfibers will contact the shaft. Each motor will have a different reading but in general you should have a maximum reading of less than 2 ohms. If the reading is higher, clean the shaft again and retest.

Motor shaft must be conductive:

Shaft must be clean and free of any coatings, paint, or other nonconductive material (clean to bare metal). Depending on the condition of the shaft, it may require using emery cloth or Scotch-Brite™. If the shaft is visibly clean, a non petroleum based solvent may be used to remove any residue. If possible, check the conductivity of the shaft using an ohm meter.

AEGIS® Rings should not operate over a keyway because the edges are very sharp. For proper performance:

Adjust or change spacer and screw lengths to avoid the keyway; or

Fill the keyway (in the area where the AEGIS® microfibers will be in contact with the shaft) with a fast-curing epoxy putty such as Devcon® Plastic Steel® 5 Minute® Putty(SF).

Shaft Preparation for Internal and External Installation





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Where AEGIS® SGR is exposed to excessive debris, additional protection of the AEGIS® SGR fibers may be necessary.

Install an O-ring or V-slinger against the ring.

After installation, test for a conductive path to ground using an Ohm meter. Place one probe on metal frame of AEGIS® SGR and one probe on motor frame.

Motor must be grounded to common earth ground with drive according to applicable standards.

Do not use thread lock to secure the mounting screws as it may compromise the conductive path to ground.

If thread lock is required, use a small amount of EP2400 AEGIS® Conductive Epoxy to secure the screws in place.

Install the AEGIS® SGR so that the aluminum frame maintains an even clearance around the shaft. AEGIS® conductive microfibers must be in contact with conductive metal surface of the shaft.

For medium voltage and higher power motors in severe duty environments, the AEGIS® PRO SLR incorporates two specially customized O-rings to protect fibers from excessive dirt and grease.

For custom applications, contact AEGIS® Customer Service/Engineering for assistance.

Shaft Preparation continued



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Recommended Testing Equipment:

AEGIS® Shaft Voltage Tester™ 100 MHz Digital Oscilloscope with a 10:1 Shaft Voltage Probe™ kit. We recommend a minimum 100MHz bandwidth to accurately measure the high frequency transitions associated with bearing discharge and VFD waveforms.

Recommended Product: PN: AEGIS-OSC-9100MB-W2

• Two 1X/10X probes, one with Shaft Voltage Probe™ SVP Tip attached

• 1000V CAT III multimeter test leads• AEGIS® One-Touch™ instant image capture feature• USB flash drive for waveform recording• 5 hour+ rechargeable/replaceable Li battery• Carrying case

PN: SVP-KIT-9100MBCaution: Use appropriate safety procedures near rotating equipment.

AEGIS® SVP Shaft Voltage Probe™

The AEGIS® SVP Shaft Voltage Probe™ tip attaches to an oscilloscope voltage probe to easily and accurately measure the voltage on a rotating shaft. The high density of conductive microfibers ensures continuous contact with the rotating shaft. The SVP-KIT-9100MB includes replacement tips, extender rods, a magnetic base/probe holder and AEGIS® Ring simulator.

Shaft Voltage Test Report: Measuring the shaft voltage on VFD driven motors provides the user with valuable information to determine if there is a potential risk of bearing damage from electrical bearing discharges. Surveying and documenting shaft voltage readings and waveforms will assist in determining the appropriate mitigation or solution.

Note: The best time for shaft voltage measurements is during initial start-up in new or repaired motors operated by the VFD. Shaft voltage measurements should be incorporated into preventive and predictive maintenance programs and may be combined with vibration analysis, thermography or other services.

Report template available at: www.est-aegis.com/bearing

Shaft Voltage Testing - Measuring Shaft Voltages

AEGIS-OSC-9100MB-W2

AEGIS® Shaft Voltage Testing




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With the AEGIS® ring installed, a bare steel shaft will typically show shaft voltages of 2 to 10 volts peak to peak (1 to 5 volts peak) depending on the power of the motor, ground noise, the conductivity of the shaft and other factors. The voltage readings may be decreased further with the application of AEGIS® Colloidal Silver Shaft Coating which allows for higher shaft surface conductivity and a more efficient electron transfer to the conductive micro fiber tips.

The waveform image shows the low peak to peak waveform of a motor with the AEGIS® SGR ring installed and discharging the shaft voltages normally.

Peak to Peak voltage with AEGIS® ring installed –

Typically the voltages are 4 to 15 volts peak to peak (2 to 8 volts peak). The waveform image shows a more continuous discharge pattern with lower dv/dt frequencies. The lower voltage may be due to greater current flow in the bearings which is the result of the bearing lubrication becoming conductive or could be a function of the motor’s drive, speed, loading or other factors. As discharges occur in the bearings, the lubrication is contaminated with carbon and metal particles. The lower impedance to the shaft voltages results in lower peak to peak voltages. This condition is usually found in motors that have been in operation for many months or years.

Low amplitude voltage discharge pattern –

Typically 20 to 120 volts peak to peak (10 to 60 volts peak). The waveform image shows the capacitive coupled common mode voltage on the shaft of the motor. The “six-step” wave form is the result of the 3 phases of pulses from the VFD. The timing of the pulse width modulation (PWM) pulses to the motor from the drive determines what the waveform looks like. Sometimes it will look like a square wave.

This six-step or square wave is what is seen when there is no bearing discharge and the peak to peak shaft voltage is at its maximum level. The voltage level may eventually overcome the dielectric in non-isolated bearings and begin discharging.

High Peak to Peak common mode voltage –

Examples of Shaft Voltage Readings

Typically EDM discharges can occur from 20 to 80 volts peak to peak (10 to 40 volts peak) depending on the motor, the type of bearing, the age of the bearing, and other factors. The waveform image shows an increase in voltage on the shaft and then a sharp vertical line indicating a voltage discharge. This can occur thousands of times in a second, based on the carrier frequency of the drive. The sharp vertical discharge at the trailing edge of the voltage is an ultra high frequency dv/dt with a typical “discharge frequency” of 1 to 125 MHz (based on testing results in many applications). Reference: NEMA MG1 Section 31.4.4.3

High amplitude EDM discharge pattern –

10-40 volts peak (typical)



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4. Connect 10:1 probe into Ch 1.

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The following pages describe the settings and parameters we use to capture shaft voltages. For ease of use, the factory settings are preset for shaft voltage measurements.

To demonstrate, we will use the AEGIS-OSC-9100 Shaft Voltage Tester™ - a 2 channel - 100 MHz Digital Oscilloscope designed to easily capture shaft voltage measurements on operating equipment. Refer to your owner’s manual or quick start for detailed instructions and explanations of other advanced functions.

The AEGIS® Shaft Voltage Tester™ may be reset to factory settings at any time using the procedure below.

AEGIS-OSC-9100 Setup and Parameters

3. Secure the AEGIS® probe tip using the thumb screw. Be careful not to over-tighten.

1. The AEGIS® Meter probe has an insulated sleeve over the tip. Do not remove this cover.

AEGIS® Meter Probe PP510 10:1 probe

Setup: AEGIS® SVP Tip Installation

2. Set the probe to 10X.

Setup: Factory Settings / Reset

1. Press SAVE/RECALL

2. F1 TYPE. Choose FACTORY. Press

3. F5 LOAD

Default parameters included:• DC Coupling• Waveform Sampling• Peak to Peak Voltage (Vpp)

displayed on Measure screen

For the full list of factory settings, see theuser manual included on the flash driveor online.

www.est-aegis.com/tester-manualNote: The AEGIS® meter comes with one SVP probe tip already installed





Patented Technology

Setup: Calibrating the Probe

Press AUTO. The scope will display a train of approximately square waves of amplitude 3V and frequency 1 kHz.Plug the dongle into the small

USB port, clamp the probe ground lead to the lower prong, and touch the SVP Tip to the upper prong.

Using the included screwdriver with insulated handle, adjust the screw in the probe until the waves are displayed with square edges. The probe is now calibrated.

Remove dongle.

Adjustment screw

Now the scope is set up to calibrate the probe. The AEGIS-OSC-9100 includes a two-pronged calibration dongle that plugs into the side of the scope. This micro-USB dongle generates a square wave used to fine-tune the probe.

Calibration must be done the first time a new probe is used, and should be checked periodically to ensure accurate waveform measurements.

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Setup: Select 10X Probe

Press CH1 to bring up the CH1 menu on Page 1/3. (If a different page pops up, press F5 to cycle back to Page 1/3). Press F4 Probe

Select 10X with the blue up and down arrows and press

. Press MENU to exit the CH1 menu.

Be sure probe is set to 10X.



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Menu Button

Auto Button

Run/Stop Button

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The MENU button opens and closes the last menu viewed.

Pressing MENU again opens it back up.

Here is the CH1 menu. Pressing MENU collapses it.

Caution: Shaft voltages are highly random so using AUTO mode may give too large a timescale. This can be adjusted. See Setting Time Period (page 39).

...and displays Vpp, right onscreen. This will remain until a menu is brought up.

When viewing a waveform, pressing AUTO resizes the voltage and time scales to fit the waveform...

Pressing RUN/STOP again resumes measurement. Stop will change to Trig’d or Auto.

This enables you to analyze the waveform more easily and save if desired.

While making measurements, RUN/STOP freezes the screen. When stopped, the word STOP will appear in the upper left of the screen.

Note: Noise from the VFD may also cause CH2 to be displayed - even if no probe is plugged into the CH2 BNC. If this occurs, press CH2 until the red trace disappears, and find Vpp using Measure or Cursors (page 41).





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This is an example of a Time period set to 25 microseconds (25/1,000,000). It clearly shows a climb in voltage and a sharp discharge to ground.

Control the horizontal scale of the displayed signal by adjusting the time scale. 500μs (microseconds) is a good place to start and then adjust the time based on the conditions. The selected seconds per division setting is shown at the bottom center of the screen. The EDM wave forms are best displayed at a setting of 50us/div or less. Adjust the time setting to show the desired waveform.

Press “ns” to increase horizontal sensitivity (wider waveforms)

Press “s” to decrease horizontal sensitivity (narrower waveforms)

Setting Time Period

An EDM discharge pattern will show a climb in voltage and then a sharp vertical line. The sharp vertical line shows the moment of discharge to ground. To get a good image of a discharge, you may need to adjust the display scale.

Control the vertical scale of the displayed signal by adjusting the volts per division. The entire signal, from peak to peak, should all be displayed on the screen. 5V is a good place to start, and then adjust up or down based on the conditions. The setting selected in volts per division is shown in the lower left of the screen.

Press “V” to decrease vertical sensitivity (shorter waveforms)

Press “mV” to increase vertical sensitivity (taller waveforms)

Setting Voltage Amplitude

In this example the amplitude is too large. Decrease the range (V) to show top and bottom peaks.

In this example the amplitude is too small. Increase the range (mV) to show more detail.

Amplitude will need to be adjusted according to the conditions. Set to show complete wave from top peak to bottom peak using the scale buttons.



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1. Plug in a USB drive – you will get a screen message “USB Flash Drive Plugged In!”

2. Hold the SAVE/RECALL button in for approximately six seconds until progress bar appears near the bottom of the screen.

3. When finished saving images, simply remove the USB Flash drive and view .BMP on computer

Screen capture may be done either during a “live view” or when the screen is paused:

1. Press RUN/STOP to pause the screen. Voltage & time scales can be changed while screen is stopped.

2. When the bars have disappeared, press RUN/STOP to resume live view.

AEGIS® One-Touch™ Screen Capture FeatureSaving Images as .BMP on USB

The up arrow moves the waveform higher onscreen & the down arrow moves it lower. The current offset level is indicated by the blue 1 and arrow at the extreme left of the screen.

Waveforms’ onscreen position can be adjusted by offsetting the voltage.

Some waveforms may display too high or low on the screen. This often happens when using the MEASURE window (described on page 41).

Adjusting Waveform Position

The time can also be offset. The arrows under similarly move waveforms left and right.





Patented Technology

Peak to Peak Voltage (Vpp) with MeasureThe AEGIS-OSC-9100 offers three methods to meaure peak to peak voltage (Vpp): Measure, and Cursor, and Auto. Auto was described in the Auto Button section (page 38).

Peak to Peak Voltage with Cursors

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Press F2 TYPE. Choose Vpp, then press Press F5 RETURN

Press F1 VOLTAGE

MEASURE

Press CURSOR|MEASURE until the MEASURE menu appears. If Vpp is listed above F1, skip the rest of this section. Otherwise, press F1 to continue set up.

Note: If TIME displays over F2, press F2 until it changes to VOLTAGE.

Press F1 MODE, select Manual, and press

Press CURSOR|MEASURE until the CURSOR menu appears.

ΔV is the peak voltage of the discharge. For a better view, press MENU to collapse the cursor menu.

Press F5 CurB and use & to move the cursor to the bottom of the discharge to be measured.

Press F4 CurA and use the blue & to move the upper cursor

(emphasized above) to the top of discharge to be measured.



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Shaft Voltage Reading

1. Shaft must be clean & free of any coatings, paint or other nonconductive material.

2. Secure the probe in place with magnetic base.

3. Align AEGIS® SVP on shaft end or side ensuring continuous contact. Avoid keyway if possible.

4. Place oscilloscope grounding lead on bare metal of motor ensuring conductive path to ground.

5. If this test is to be used in a report, save an image to a USB drive.

Follow all safety precaution when working with rotating equipment.

Taking the Measurements- Shaft Voltage

Ground Reference Reading: EMI

1. The reading displays ground noise or EMI being produced by the motor/drive system. This electrical noise may be present before and after installing the AEGIS® ring.

2. Find 2 ground points on the motor. Must be bare metal and conductive.

3. Place the SVP on one of the points and the probe grounding clip on the other point.

4. Measurements will vary depending on the motor size and conditions.

Taking the Measurements- EMI





Patented Technology

AEGIS® Grounding Simulator™

ProbeGrounding Lead

SVP Tipon Shaft

Simulator Grounding Lead

Simulator

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The voltage measurement of 2.2V peak to peak is an example of the voltage discharging through the AEGIS® Grounding Simulator to ground. The AEGIS® SGR Bearing Protection Ring will perform equally or better.


1. Maintain the same setup as above.

2. Place the AEGIS® Grounding Simulator™ grounding lead on bare metal of motor ensuring conductive path to ground.

3. Place the Simulator against the shaft to simulate the AEGIS® SGR Bearing Protection Ring.

4. Freeze the screen and save the image.

Next Take the Shaft Voltage Reading with the Grounding Simulator™ Touching the Shaft

The voltage measurement of 28.6V peak to peak is an example of the voltage discharging through the bearings without AEGIS® shaft grounding.


1. Shaft must be clean & free of any coatings, paint or other nonconductive material.

2. Secure the probe in place with magnetic base.

3. Align AEGIS® SVP™ on shaft end or side ensuring continuous contact. Avoid keyway if possible.

4. Place probe grounding lead on bare metal of motor ensuring conductive path to ground.

5. Save the image, as described on page 40.

First Take the Shaft Voltage Reading without Shaft Grounding

1. Take the Shaft Voltage Reading without Shaft Grounding

2. Take the Shaft Voltage Reading with the AEGIS® Grounding Simulator™

The AEGIS® Grounding Simulator™ can be used to simulate how the shaft voltages will change after an AEGIS® Ring is installed. It is a quick way of showing a “Before & After” but since only a small amount of conductive microfibers are touching the shaft the shaft voltage may be higher than when the circumferential AEGIS® Ring is installed.

Measurements Using the AEGIS® Grounding Simulator™



Patented Technology

MotorEndBracket

(.295” thick)

Shaft

• Screw on mounting - shaft length needs to be a minimum of 0.375” (9.5mm).

• Conductive epoxy mounting - shaft length needs to be a mimimum of 0.395” (10.03mm).

AEGIS® Ring

MotorEndBracket

(.295” thick)

Shaft

AEGIS® Ring

Measure 0.125” from end bracket.

MotorEndBracket

Avoids Shaft Shoulder

Measure ShaftDiameter Here

Avoids Slinger / Seal

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SPECCustom Option for Short Shaft Shoulders: If the shaft shoulder is between .1875” and 0.375” we offer a custom part with fibers closer to the back of the ring. To order this option, add an “X” or “AX” to the suffix of the part.

Example:Standard SGR Short Shoulder SGRPN: SGR-6.9-0A4W PN: SGR-6.9-0A4WXPN: SGR-6.9-0AW PN: SGR-6.9-0AWXPN: SGR-6.9-1 PN: SGR-6.9-1AXPN: SGR-6.9-1A4 PN: SGR-6.9-1A4XPN: SGR-6.9-3FH PN: SGR-6.9-3FHAX

If the shoulder is less than 0.1875”, then refer to the uKIT.

If YES and you want to mount the ring to fit the shaft shoulder then you need to measure the length of the shoulder. See note in red below. If still applicable, measure shaft shoulder diameter then refer to parts list (as shown above) to locate the correct SGR part number.

Example shaft measurement

0.445”fits between

Measure shaft diameter at a point 0.125” from motor end bracket. Then refer to the parts list to locate the correct part number and mounting option of your choosing.

If NO, the ring can be mounted directly to the end bracket using screws or conductive epoxy.

AEGIS® uKIT is attached to motor with screws/washers provided or with conductive epoxy. AEGIS® EP2400 Conductive Epoxy sold separately.

See AEGIS® website for bolt hole circle and installation instructions.

See page 49 for more details.

If YES or NOT SURE, then the AEGIS® uKIT is the easiest option because it avoids the shaft shoulder area, any slingers/seals or irregular shaped end bracket.

Question to ask: Does the motor have a shaft shoulder?

For standard NEMA or IEC frame motors, the AEGIS® uKIT is the best option. It avoids most shaft shoulders and slingers/seals.

AEGIS® uKIT includes 4 different bracket sizes to suit most situations.

Selecting the Correct Size Ring

Solid Ring Catalog Number

Split Ring Catalog Number

Bolt ThroughCatalog Number

Solid Ring with Conductive Epoxy

Split Ring with Conductive Epoxy

Min. ShaftDiameter

Max. ShaftDiameter

SGR-9.0-1 SGR-9.0-1A4 SGR-9.0-3FH SGR-9.0-0AW SGR-9.0-0A4W 0.396 0.435SGR-10.1-1 SGR-10.1-1A4 SGR-10.1-3FH SGR-10.1-0AW SGR-10.1-0A4W 0.436 0.480SGR-11.2-1 SGR-11.2-1A4 SGR-11.2-3FH SGR-11.2-0AW SGR-11.2-0A4W 0.481 0.520




Patented Technology

MOT

ORGR

OUND

ING

BEAR

ING

CURR

ENTS

DCM

OTOR

SSH

AFT V

OLTA

GETE

STIN

GPA

RTS

LIST

MED

VOLT

AGE

MOT

ORS

LOW

VOLT

AGE

MOT

ORS

AEGI

S®TE

CHNO

LOGY

INST

ALL

SHAF

T PRE

PSE

LECT

CORR

ECT S

IZE

ENGI

NEER

ING

SPEC

pg. 46-47

pg. 49

pg. 46-47

pg. 46-47

pg. 46-47

pg.48

pg.50-51

pg.53

pg.52

AccessoriesHFGS - High-Frequency Ground StrapCS015 - AEGIS® Colloidal Silver Shaft CoatingEP2400 - AEGIS® Conductive Epoxy

AEGIS® Shaft Voltage Tester™AEGIS® Shaft Voltage Tester™SVP - AEGIS® Shaft Voltage Probe

AEGIS® PRO Series and WTG6 rows of conductive microfiberAEGIS® PRO Series AEGIS® WTG for Wind Turbine Generators

Press Fit Mounting (-0A6)Shaft diameters: 0.311” to 6.02” Clean dry 0.004” press fit Custom sizes available

Bolt Through Mounting (-3FH)Shaft diameters: 0.311” to 6.02” 6-32 x 1/2” flat head screws2 mounting holes up to shaft size 3.395”4 mounting holes for larger sizes

Split Ring (-1A4)Shaft diameter: 0.311” to 6.02” 4 to 6 mounting clamps, 6-32 x 1/4” cap screws and washersInstalls without decoupling motor

Standard Mounting Clamps (-1)Shaft diameters: 0.311” to 6.02” 3 to 4 mounting clamps, 6-32 x 1/4” cap screws and washersQuick and easy installation to most surfaces

Conductive Epoxy Mounting (-0AW, -0A4W)Shaft diameters: 0.311” to 6.02” Solid and Split RingQuick and easy installation to metal motor frameConductive Epoxy Included

uKIT - SGR with Universal Mounting BracketSized for NEMA and IEC Frame motorsSolid and Split RingCan be mounted with hardware or conductive epoxy

AEGIS® SGR Bearing Protection Ring Options

AEGIS® Shaft Grounding Ring Parts List


Patented Technology

MOTOR

GROUNDINGBEARING

CURRENTSDC

MOTORS


PARTSLIST

MED VOLTAGEM

OTORSLOW

VOLTAGEM

OTORSAEGIS®

TECHNOLOGYINSTALL

SHAFT PREPSELECT


SPEC

Dimensions in inches

Solid Ring, Split Ring, and Bolt Through Mountingfor Low Voltage Motors to 500 HP


Solid RingCatalog Number

Split Ring*Catalog Number



Split Ring* with Conductive Epoxy

Min. ShaftDiameter

Max. ShaftDiameter

Outside Diameter

Thickness Max

SGR-6.9-1 SGR-6.9-1A4 SGR-6.9-3FH SGR-6.9-0AW SGR-6.9-0A4W 0.311 0.355 1.60 0.295SGR-8.0-1 SGR-8.0-1A4 SGR-8.0-3FH SGR-8.0-0AW SGR-8.0-0A4W 0.356 0.395 1.60 0.295SGR-9.0-1 SGR-9.0-1A4 SGR-9.0-3FH SGR-9.0-0AW SGR-9.0-0A4W 0.396 0.435 1.60 0.295SGR-10.1-1 SGR-10.1-1A4 SGR-10.1-3FH SGR-10.1-0AW SGR-10.1-0A4W 0.436 0.480 1.60 0.295SGR-11.2-1 SGR-11.2-1A4 SGR-11.2-3FH SGR-11.2-0AW SGR-11.2-0A4W 0.481 0.520 1.60 0.295SGR-12.2-1 SGR-12.2-1A4 SGR-12.2-3FH SGR-12.2-0AW SGR-12.2-0A4W 0.521 0.560 1.60 0.295SGR-13.2-1 SGR-13.2-1A4 SGR-13.2-3FH SGR-13.2-0AW SGR-13.2-0A4W 0.561 0.605 1.60 0.295SGR-14.4-1 SGR-14.4-1A4 SGR-14.4-3FH SGR-14.4-0AW SGR-14.4-0A4W 0.606 0.645 1.60 0.295SGR-15.4-1 SGR-15.4-1A4 SGR-15.4-3FH SGR-15.4-0AW SGR-15.4-0A4W 0.646 0.685 2.10 0.295SGR-16.4-1 SGR-16.4-1A4 SGR-16.4-3FH SGR-16.4-0AW SGR-16.4-0A4W 0.686 0.730 2.10 0.295SGR-17.6-1 SGR-17.6-1A4 SGR-17.6-3FH SGR-17.6-0AW SGR-17.6-0A4W 0.731 0.774 2.10 0.295SGR-18.7-1 SGR-18.7-1A4 SGR-18.7-3FH SGR-18.7-0AW SGR-18.7-0A4W 0.775 0.815 2.10 0.295SGR-19.7-1 SGR-19.7-1A4 SGR-19.7-3FH SGR-19.7-0AW SGR-19.7-0A4W 0.816 0.855 2.10 0.295SGR-20.7-1 SGR-20.7-1A4 SGR-20.7-3FH SGR-20.7-0AW SGR-20.7-0A4W 0.856 0.895 2.10 0.295SGR-21.7-1 SGR-21.7-1A4 SGR-21.7-3FH SGR-21.7-0AW SGR-21.7-0A4W 0.896 0.935 2.10 0.295SGR-22.8-1 SGR-22.8-1A4 SGR-22.8-3FH SGR-22.8-0AW SGR-22.8-0A4W 0.936 0.980 2.10 0.295SGR-23.9-1 SGR-23.9-1A4 SGR-23.9-3FH SGR-23.9-0AW SGR-23.9-0A4W 0.981 1.020 2.10 0.295SGR-24.9-1 SGR-24.9-1A4 SGR-24.9-3FH SGR-24.9-0AW SGR-24.9-0A4W 1.021 1.060 2.10 0.295SGR-25.9-1 SGR-25.9-1A4 SGR-25.9-3FH SGR-25.9-0AW SGR-25.9-0A4W 1.061 1.105 2.10 0.295SGR-27.1-1 SGR-27.1-1A4 SGR-27.1-3FH SGR-27.1-0AW SGR-27.1-0A4W 1.106 1.145 2.10 0.295SGR-28.1-1 SGR-28.1-1A4 SGR-28.1-3FH SGR-28.1-0AW SGR-28.1-0A4W 1.146 1.185 2.10 0.295SGR-29.1-1 SGR-29.1-1A4 SGR-29.1-3FH SGR-29.1-0AW SGR-29.1-0A4W 1.186 1.230 2.10 0.295SGR-30.3-1 SGR-30.3-1A4 SGR-30.3-3FH SGR-30.3-0AW SGR-30.3-0A4W 1.231 1.270 2.10 0.295SGR-31.3-1 SGR-31.3-1A4 SGR-31.3-3FH SGR-31.3-0AW SGR-31.3-0A4W 1.271 1.310 2.10 0.295SGR-32.3-1 SGR-32.3-1A4 SGR-32.3-3FH SGR-32.3-0AW SGR-32.3-0A4W 1.311 1.355 2.10 0.295SGR-33.4-1 SGR-33.4-1A4 SGR-33.4-3FH SGR-33.4-0AW SGR-33.4-0A4W 1.356 1.395 2.10 0.295SGR-34.4-1 SGR-34.4-1A4 SGR-34.4-3FH SGR-34.4-0AW SGR-34.4-0A4W 1.396 1.435 2.68 0.295SGR-35.5-1 SGR-35.5-1A4 SGR-35.5-3FH SGR-35.5-0AW SGR-35.5-0A4W 1.436 1.480 2.68 0.295SGR-36.6-1 SGR-36.6-1A4 SGR-36.6-3FH SGR-36.6-0AW SGR-36.6-0A4W 1.481 1.520 2.68 0.295SGR-37.6-1 SGR-37.6-1A4 SGR-37.6-3FH SGR-37.6-0AW SGR-37.6-0A4W 1.521 1.560 2.68 0.295SGR-38.6-1 SGR-38.6-1A4 SGR-38.6-3FH SGR-38.6-0AW SGR-38.6-0A4W 1.561 1.605 2.68 0.295SGR-39.8-1 SGR-39.8-1A4 SGR-39.8-3FH SGR-39.8-0AW SGR-39.8-0A4W 1.606 1.645 2.68 0.295SGR-40.8-1 SGR-40.8-1A4 SGR-40.8-3FH SGR-40.8-0AW SGR-40.8-0A4W 1.646 1.685 2.68 0.295SGR-41.8-1 SGR-41.8-1A4 SGR-41.8-3FH SGR-41.8-0AW SGR-41.8-0A4W 1.686 1.730 2.68 0.295SGR-43.0-1 SGR-43.0-1A4 SGR-43.0-3FH SGR-43.0-0AW SGR-43.0-0A4W 1.731 1.770 2.68 0.295SGR-44.0-1 SGR-44.0-1A4 SGR-44.0-3FH SGR-44.0-0AW SGR-44.0-0A4W 1.771 1.810 2.68 0.295SGR-45.0-1 SGR-45.0-1A4 SGR-45.0-3FH SGR-45.0-0AW SGR-45.0-0A4W 1.811 1.855 2.68 0.295SGR-46.1-1 SGR-46.1-1A4 SGR-46.1-3FH SGR-46.1-0AW SGR-46.1-0A4W 1.856 1.895 2.68 0.295SGR-47.1-1 SGR-47.1-1A4 SGR-47.1-3FH SGR-47.1-0AW SGR-47.1-0A4W 1.896 1.935 2.68 0.295SGR-48.2-1 SGR-48.2-1A4 SGR-48.2-3FH SGR-48.2-0AW SGR-48.2-0A4W 1.936 1.980 2.68 0.295SGR-49.3-1 SGR-49.3-1A4 SGR-49.3-3FH SGR-49.3-0AW SGR-49.3-0A4W 1.981 2.020 2.68 0.295SGR-50.3-1 SGR-50.3-1A4 SGR-50.3-3FH SGR-50.3-0AW SGR-50.3-0A4W 2.021 2.060 3.10 0.295SGR-51.3-1 SGR-51.3-1A4 SGR-51.3-3FH SGR-51.3-0AW SGR-51.3-0A4W 2.061 2.105 3.10 0.295SGR-52.5-1 SGR-52.5-1A4 SGR-52.5-3FH SGR-52.5-0AW SGR-52.5-0A4W 2.106 2.145 3.10 0.295SGR-53.5-1 SGR-53.5-1A4 SGR-53.5-3FH SGR-53.5-0AW SGR-53.5-0A4W 2.146 2.185 3.10 0.295SGR-54.5-1 SGR-54.5-1A4 SGR-54.5-3FH SGR-54.5-0AW SGR-54.5-0A4W 2.186 2.230 3.10 0.295SGR-55.7-1 SGR-55.7-1A4 SGR-55.7-3FH SGR-55.7-0AW SGR-55.7-0A4W 2.231 2.270 3.10 0.295SGR-56.7-1 SGR-56.7-1A4 SGR-56.7-3FH SGR-56.7-0AW SGR-56.7-0A4W 2.271 2.310 3.10 0.295SGR-57.7-1 SGR-57.7-1A4 SGR-57.7-3FH SGR-57.7-0AW SGR-57.7-0A4W 2.311 2.355 3.10 0.295SGR-58.8-1 SGR-58.8-1A4 SGR-58.8-3FH SGR-58.8-0AW SGR-58.8-0A4W 2.356 2.395 3.10 0.295SGR-59.8-1 SGR-59.8-1A4 SGR-59.8-3FH SGR-59.8-0AW SGR-59.8-0A4W 2.396 2.435 3.60 0.295SGR-60.9-1 SGR-60.9-1A4 SGR-60.9-3FH SGR-60.9-0AW SGR-60.9-0A4W 2.436 2.480 3.60 0.295SGR-62.0-1 SGR-62.0-1A4 SGR-62.0-3FH SGR-62.0-0AW SGR-62.0-0A4W 2.481 2.520 3.60 0.295SGR-63.0-1 SGR-63.0-1A4 SGR-63.0-3FH SGR-63.0-0AW SGR-63.0-0A4W 2.521 2.560 3.60 0.295SGR-64.0-1 SGR-64.0-1A4 SGR-64.0-3FH SGR-64.0-0AW SGR-64.0-0A4W 2.561 2.605 3.60 0.295SGR-65.2-1 SGR-65.2-1A4 SGR-65.2-3FH SGR-65.2-0AW SGR-65.2-0A4W 2.606 2.645 3.60 0.295SGR-66.2-1 SGR-66.2-1A4 SGR-66.2-3FH SGR-66.2-0AW SGR-66.2-0A4W 2.646 2.685 3.60 0.295SGR-67.2-1 SGR-67.2-1A4 SGR-67.2-3FH SGR-67.2-0AW SGR-67.2-0A4W 2.686 2.730 3.60 0.295SGR-68.4-1 SGR-68.4-1A4 SGR-68.4-3FH SGR-68.4-0AW SGR-68.4-0A4W 2.731 2.770 3.60 0.295SGR-69.4-1 SGR-69.4-1A4 SGR-69.4-3FH SGR-69.4-0AW SGR-69.4-0A4W 2.771 2.810 3.60 0.295SGR-70.4-1 SGR-70.4-1A4 SGR-70.4-3FH SGR-70.4-0AW SGR-70.4-0A4W 2.811 2.855 3.60 0.295SGR-71.5-1 SGR-71.5-1A4 SGR-71.5-3FH SGR-71.5-0AW SGR-71.5-0A4W 2.856 2.895 3.60 0.295SGR-72.5-1 SGR-72.5-1A4 SGR-72.5-3FH SGR-72.5-0AW SGR-72.5-0A4W 2.896 2.935 4.10 0.295SGR-73.6-1 SGR-73.6-1A4 SGR-73.6-3FH SGR-73.6-0AW SGR-73.6-0A4W 2.936 2.980 4.10 0.295SGR-74.7-1 SGR-74.7-1A4 SGR-74.7-3FH SGR-74.7-0AW SGR-74.7-0A4W 2.981 3.020 4.10 0.295SGR-75.7-1 SGR-75.7-1A4 SGR-75.7-3FH SGR-75.7-0AW SGR-75.7-0A4W 3.021 3.060 4.10 0.295SGR-76.7-1 SGR-76.7-1A4 SGR-76.7-3FH SGR-76.7-0AW SGR-76.7-0A4W 3.061 3.105 4.10 0.295SGR-77.9-1 SGR-77.9-1A4 SGR-77.9-3FH SGR-77.9-0AW SGR-77.9-0A4W 3.106 3.145 4.10 0.295SGR-78.9-1 SGR-78.9-1A4 SGR-78.9-3FH SGR-78.9-0AW SGR-78.9-0A4W 3.146 3.185 4.10 0.295

*Custom Part-No Return *Custom Part-No Return




Patented Technology

Note: Use PRO Series Rings for Low Voltage Motors Greater than 500 HP and All Medium Voltage MotorsSee page 22

MOT

ORGR

OUND

ING

BEAR

ING

CURR

ENTS

DCM

OTOR

SSH

AFT V

OLTA

GETE

STIN

GPA

RTS

LIST

MED

VOLT

AGE

MOT

ORS

LOW

VOLT

AGE

MOT

ORS

AEGI

S®TE

CHNO

LOGY

INST

ALL

SHAF

T PRE

PSE

LECT

CORR

ECT S

IZE

ENGI

NEER

ING

SPEC


Solid RingCatalog Number

Split Ring*Catalog Number



Split Ring* with Conductive Epoxy

Min. ShaftDiameter

Max. ShaftDiameter

Outside Diameter

Thickness Max

SGR-79.9-1 SGR-79.9-1A4 SGR-79.9-3FH SGR-79.9-0AW SGR-79.9-0A4W 3.186 3.230 4.10 0.295SGR-81.1-1 SGR-81.1-1A4 SGR-81.1-3FH SGR-81.1-0AW SGR-81.1-0A4W 3.231 3.270 4.10 0.295SGR-82.1-1 SGR-82.1-1A4 SGR-82.1-3FH SGR-82.1-0AW SGR-82.1-0A4W 3.271 3.310 4.10 0.295SGR-83.1-1 SGR-83.1-1A4 SGR-83.1-3FH SGR-83.1-0AW SGR-83.1-0A4W 3.311 3.355 4.10 0.295SGR-84.2-1 SGR-84.2-1A4 SGR-84.2-3FH SGR-84.2-0AW SGR-84.2-0A4W 3.356 3.395 4.10 0.295SGR-85.2-1 SGR-85.2-1A4 SGR-85.2-3FH SGR-85.2-0AW SGR-85.2-0A4W 3.396 3.435 4.60 0.295SGR-86.3-1 SGR-86.3-1A4 SGR-86.3-3FH SGR-86.3-0AW SGR-86.3-0A4W 3.436 3.480 4.60 0.295SGR-87.4-1 SGR-87.4-1A4 SGR-87.4-3FH SGR-87.4-0AW SGR-87.4-0A4W 3.481 3.520 4.60 0.295SGR-88.4-1 SGR-88.4-1A4 SGR-88.4-3FH SGR-88.4-0AW SGR-88.4-0A4W 3.521 3.560 4.60 0.295SGR-89.4-1 SGR-89.4-1A4 SGR-89.4-3FH SGR-89.4-0AW SGR-89.4-0A4W 3.561 3.605 4.60 0.295SGR-90.6-1 SGR-90.6-1A4 SGR-90.6-3FH SGR-90.6-0AW SGR-90.6-0A4W 3.606 3.645 4.60 0.295SGR-91.6-1 SGR-91.6-1A4 SGR-91.6-3FH SGR-91.6-0AW SGR-91.6-0A4W 3.646 3.685 4.60 0.295SGR-92.6-1 SGR-92.6-1A4 SGR-92.6-3FH SGR-92.6-0AW SGR-92.6-0A4W 3.686 3.730 4.60 0.295SGR-93.8-1 SGR-93.8-1A4 SGR-93.8-3FH SGR-93.8-0AW SGR-93.8-0A4W 3.731 3.770 4.60 0.295SGR-94.8-1 SGR-94.8-1A4 SGR-94.8-3FH SGR-94.8-0AW SGR-94.8-0A4W 3.771 3.810 4.60 0.295SGR-95.8-1 SGR-95.8-1A4 SGR-95.8-3FH SGR-95.8-0AW SGR-95.8-0A4W 3.811 3.855 4.60 0.295SGR-96.9-1 SGR-96.9-1A4 SGR-96.9-3FH SGR-96.9-0AW SGR-96.9-0A4W 3.856 3.895 4.60 0.295SGR-97.9-1 SGR-97.9-1A4 SGR-97.9-3FH SGR-97.9-0AW SGR-97.9-0A4W 3.896 3.935 5.10 0.295SGR-99.0-1 SGR-99.0-1A4 SGR-99.0-3FH SGR-99.0-0AW SGR-99.0-0A4W 3.936 3.980 5.10 0.295SGR-100.1-1 SGR-100.1-1A4 SGR-100.1-3FH SGR-100.1-0AW SGR-100.1-0A4W 3.981 4.020 5.10 0.295SGR-101.1-1 SGR-101.1-1A4 SGR-101.1-3FH SGR-101.1-0AW SGR-101.1-0A4W 4.021 4.060 5.10 0.295SGR-102.1-1 SGR-102.1-1A4 SGR-102.1-3FH SGR-102.1-0AW SGR-102.1-0A4W 4.061 4.105 5.10 0.295SGR-103.3-1 SGR-103.3-1A4 SGR-103.3-3FH SGR-103.3-0AW SGR-103.3-0A4W 4.106 4.145 5.10 0.295SGR-104.3-1 SGR-104.3-1A4 SGR-104.3-3FH SGR-104.3-0AW SGR-104.3-0A4W 4.146 4.185 5.10 0.295SGR-105.3-1 SGR-105.3-1A4 SGR-105.3-3FH SGR-105.3-0AW SGR-105.3-0A4W 4.186 4.230 5.10 0.295SGR-106.5-1 SGR-106.5-1A4 SGR-106.5-3FH SGR-106.5-0AW SGR-106.5-0A4W 4.231 4.270 5.10 0.295SGR-107.5-1 SGR-107.5-1A4 SGR-107.5-3FH SGR-107.5-0AW SGR-107.5-0A4W 4.271 4.310 5.10 0.295SGR-108.5-1 SGR-108.5-1A4 SGR-108.5-3FH SGR-108.5-0AW SGR-108.5-0A4W 4.311 4.355 5.10 0.295SGR-109.6-1 SGR-109.6-1A4 SGR-109.6-3FH SGR-109.6-0AW SGR-109.6-0A4W 4.356 4.395 5.10 0.295SGR-110.6-1 SGR-110.6-1A4 SGR-110.6-3FH SGR-110.6-0AW SGR-110.6-0A4W 4.396 4.435 5.60 0.295SGR-111.7-1 SGR-111.7-1A4 SGR-111.7-3FH SGR-111.7-0AW SGR-111.7-0A4W 4.436 4.480 5.60 0.295SGR-112.8-1 SGR-112.8-1A4 SGR-112.8-3FH SGR-112.8-0AW SGR-112.8-0A4W 4.481 4.520 5.60 0.295SGR-113.8-1 SGR-113.8-1A4 SGR-113.8-3FH SGR-113.8-0AW SGR-113.8-0A4W 4.521 4.560 5.60 0.295SGR-114.8-1 SGR-114.8-1A4 SGR-114.8-3FH SGR-114.8-0AW SGR-114.8-0A4W 4.561 4.605 5.60 0.295SGR-116.0-1 SGR-116.0-1A4 SGR-116.0-3FH SGR-116.0-0AW SGR-116.0-0A4W 4.606 4.645 5.60 0.295SGR-117.0-1 SGR-117.0-1A4 SGR-117.0-3FH SGR-117.0-0AW SGR-117.0-0A4W 4.646 4.685 5.60 0.295SGR-118.0-1 SGR-118.0-1A4 SGR-118.0-3FH SGR-118.0-0AW SGR-118.0-0A4W 4.686 4.730 5.60 0.295SGR-119.2-1 SGR-119.2-1A4 SGR-119.2-3FH SGR-119.2-0AW SGR-119.2-0A4W 4.731 4.770 5.60 0.295SGR-120.2-1 SGR-120.2-1A4 SGR-120.2-3FH SGR-120.2-0AW SGR-120.2-0A4W 4.771 4.810 5.60 0.295SGR-121.2-1 SGR-121.2-1A4 SGR-121.2-3FH SGR-121.2-0AW SGR-121.2-0A4W 4.811 4.855 5.60 0.295SGR-122.3-1 SGR-122.3-1A4 SGR-122.3-3FH SGR-122.3-0AW SGR-122.3-0A4W 4.856 4.895 5.60 0.295SGR-123.3-1 SGR-123.3-1A4 SGR-123.3-3FH SGR-123.3-0AW SGR-123.3-0A4W 4.896 4.935 6.10 0.295SGR-124.4-1 SGR-124.4-1A4 SGR-124.4-3FH SGR-124.4-0AW SGR-124.4-0A4W 4.936 4.980 6.10 0.295SGR-125.5-1 SGR-125.5-1A4 SGR-125.5-3FH SGR-125.5-0AW SGR-125.5-0A4W 4.981 5.020 6.10 0.295SGR-126.5-1 SGR-126.5-1A4 SGR-126.5-3FH SGR-126.5-0AW SGR-126.5-0A4W 5.021 5.060 6.10 0.295SGR-127.5-1 SGR-127.5-1A4 SGR-127.5-3FH SGR-127.5-0AW SGR-127.5-0A4W 5.061 5.105 6.10 0.295SGR-128.7-1 SGR-128.7-1A4 SGR-128.7-3FH SGR-128.7-0AW SGR-128.7-0A4W 5.106 5.145 6.10 0.295SGR-129.7-1 SGR-129.7-1A4 SGR-129.7-3FH SGR-129.7-0AW SGR-129.7-0A4W 5.146 5.185 6.10 0.295SGR-130.7-1 SGR-130.7-1A4 SGR-130.7-3FH SGR-130.7-0AW SGR-130.7-0A4W 5.186 5.230 6.10 0.295SGR-131.9-1 SGR-131.9-1A4 SGR-131.9-3FH SGR-131.9-0AW SGR-131.9-0A4W 5.231 5.270 6.10 0.295SGR-132.9-1 SGR-132.9-1A4 SGR-132.9-3FH SGR-132.9-0AW SGR-132.9-0A4W 5.271 5.310 6.10 0.295SGR-133.9-1 SGR-133.9-1A4 SGR-133.9-3FH SGR-133.9-0AW SGR-133.9-0A4W 5.311 5.355 6.10 0.295SGR-135.0-1 SGR-135.0-1A4 SGR-135.0-3FH SGR-135.0-0AW SGR-135.0-0A4W 5.356 5.395 6.10 0.295SGR-136.0-1 SGR-136.0-1A4 SGR-136.0-3FH SGR-136.0-0AW SGR-136.0-0A4W 5.396 5.435 6.60 0.295SGR-137.1-1 SGR-137.1-1A4 SGR-137.1-3FH SGR-137.1-0AW SGR-137.1-0A4W 5.436 5.480 6.60 0.295SGR-138.2-1 SGR-138.2-1A4 SGR-138.2-3FH SGR-138.2-0AW SGR-138.2-0A4W 5.481 5.520 6.60 0.295SGR-139.2-1 SGR-139.2-1A4 SGR-139.2-3FH SGR-139.2-0AW SGR-139.2-0A4W 5.521 5.560 6.60 0.295SGR-140.2-1 SGR-140.2-1A4 SGR-140.2-3FH SGR-140.2-0AW SGR-140.2-0A4W 5.561 5.605 6.60 0.295SGR-141.4-1 SGR-141.4-1A4 SGR-141.4-3FH SGR-141.4-0AW SGR-141.4-0A4W 5.606 5.645 6.60 0.295SGR-142.4-1 SGR-142.4-1A4 SGR-142.4-3FH SGR-142.4-0AW SGR-142.4-0A4W 5.646 5.685 6.60 0.295SGR-143.4-1 SGR-143.4-1A4 SGR-143.4-3FH SGR-143.4-0AW SGR-143.4-0A4W 5.686 5.730 6.60 0.295SGR-144.6-1 SGR-144.6-1A4 SGR-144.6-3FH SGR-144.6-0AW SGR-144.6-0A4W 5.731 5.770 6.60 0.295SGR-145.6-1 SGR-145.6-1A4 SGR-145.6-3FH SGR-145.6-0AW SGR-145.6-0A4W 5.771 5.810 6.60 0.295SGR-146.6-1 SGR-146.6-1A4 SGR-146.6-3FH SGR-146.6-0AW SGR-146.6-0A4W 5.811 5.855 6.60 0.295SGR-147.7-1 SGR-147.7-1A4 SGR-147.7-3FH SGR-147.7-0AW SGR-147.7-0A4W 5.856 5.895 6.60 0.295SGR-148.7-1 SGR-148.7-1A4 SGR-148.7-3FH SGR-148.7-0AW SGR-148.7-0A4W 5.896 5.935 7.10 0.295SGR-149.8-1 SGR-149.8-1A4 SGR-149.8-3FH SGR-149.8-0AW SGR-149.8-0A4W 5.936 5.980 7.10 0.295SGR-150.9-1 SGR-150.9-1A4 SGR-150.9-3FH SGR-150.9-0AW SGR-150.9-0A4W 5.981 6.020 7.10 0.295

*Custom Part-No Return *Custom Part-No Return


Patented Technology

Catalog Number Min.shaftdiameter

Max.shaftdiameter

SGR ODTolerance +0/-0.001

ThicknessMax

BoreTolerance +0.001/-0

SGR-6.9-0A6 0.311 0.355 1.580 0.295 1.576SGR- 8.0-0A6 0.356 0.395 1.580 0.295 1.576SGR-9.0-0A6 0.396 0.435 1.580 0.295 1.576SGR-10.1-0A6 0.436 0.480 1.580 0.295 1.576SGR-11.2-0A6 0.481 0.520 1.580 0.295 1.576SGR-12.2-0A6 0.521 0.560 1.580 0.295 1.576SGR-13.2-0A6 0.561 0.605 1.580 0.295 1.576SGR-14.4-0A6 0.606 0.645 1.580 0.295 1.576SGR-15.4-0A6 0.646 0.685 2.080 0.295 2.076SGR-16.4-0A6 0.686 0.730 2.080 0.295 2.076SGR-17.6-0A6 0.731 0.774 2.080 0.295 2.076SGR-18.7-0A6 0.775 0.815 2.080 0.295 2.076SGR-19.7-0A6 0.816 0.855 2.080 0.295 2.076SGR-20.7-0A6 0.856 0.895 2.080 0.295 2.076SGR-21.7-0A6 0.896 0.935 2.080 0.295 2.076SGR-22.8-0A6 0.936 0.980 2.080 0.295 2.076SGR-23.9-0A6 0.981 1.020 2.080 0.295 2.076SGR-24.9-0A6 1.021 1.060 2.080 0.295 2.076SGR-25.9-0A6 1.061 1.105 2.080 0.295 2.076SGR-27.1-0A6 1.106 1.145 2.080 0.295 2.076SGR-28.1-0A6 1.146 1.185 2.080 0.295 2.076SGR-29.1-0A6 1.186 1.230 2.080 0.295 2.076SGR-30.3-0A6 1.231 1.270 2.080 0.295 2.076SGR-31.3-0A6 1.271 1.310 2.080 0.295 2.076SGR-32.3-0A6 1.311 1.355 2.080 0.295 2.076SGR-33.4-0A6 1.356 1.395 2.080 0.295 2.076SGR-34.4-0A6 1.396 1.435 2.660 0.295 2.656SGR-35.5-0A6 1.436 1.480 2.660 0.295 2.656SGR-36.6-0A6 1.481 1.520 2.660 0.295 2.656SGR-37.6-0A6 1.521 1.560 2.660 0.295 2.656SGR-38.6-0A6 1.561 1.605 2.660 0.295 2.656SGR-39.8-0A6 1.606 1.645 2.660 0.295 2.656SGR-40.8-0A6 1.646 1.685 2.660 0.295 2.656SGR-41.8-0A6 1.686 1.730 2.660 0.295 2.656SGR-43.0-0A6 1.731 1.770 2.660 0.295 2.656SGR-44.0-0A6 1.771 1.810 2.660 0.295 2.656SGR-45.0-0A6 1.811 1.855 2.660 0.295 2.656SGR-46.1-0A6 1.856 1.895 2.660 0.295 2.656SGR-47.1-0A6 1.896 1.935 2.660 0.295 2.656SGR-48.2-0A6 1.936 1.980 2.660 0.295 2.656SGR-49.3-0A6 1.981 2.020 2.660 0.295 2.656SGR-50.3-0A6 2.021 2.060 3.080 0.295 3.076SGR-51.3-0A6 2.061 2.105 3.080 0.295 3.076SGR-52.5-0A6 2.106 2.145 3.080 0.295 3.076SGR-53.5-0A6 2.146 2.185 3.080 0.295 3.076SGR-54.5-0A6 2.186 2.230 3.080 0.295 3.076SGR-55.7-0A6 2.231 2.270 3.080 0.295 3.076SGR-56.7-0A6 2.271 2.310 3.080 0.295 3.076SGR-57.7-0A6 2.311 2.355 3.080 0.295 3.076SGR-58.8-0A6 2.356 2.395 3.080 0.295 3.076SGR-59.8-0A6 2.396 2.435 3.580 0.295 3.576SGR-60.9-0A6 2.436 2.480 3.580 0.295 3.576SGR-62.0-0A6 2.481 2.520 3.580 0.295 3.576SGR-63.0-0A6 2.521 2.560 3.580 0.295 3.576SGR-64.0-0A6 2.561 2.605 3.580 0.295 3.576SGR-65.2-0A6 2.606 2.645 3.580 0.295 3.576SGR-66.2-0A6 2.646 2.685 3.580 0.295 3.576SGR-67.2-0A6 2.686 2.730 3.580 0.295 3.576SGR-68.4-0A6 2.731 2.770 3.580 0.295 3.576SGR-69.4-0A6 2.771 2.810 3.580 0.295 3.576SGR-70.4-0A6 2.811 2.855 3.580 0.295 3.576SGR-71.5-0A6 2.856 2.895 3.580 0.295 3.576SGR-72.5-0A6 2.896 2.935 4.080 0.295 4.076SGR-73.6-0A6 2.936 2.980 4.080 0.295 4.076SGR-74.7-0A6 2.981 3.020 4.080 0.295 4.076SGR-75.7-0A6 3.021 3.060 4.080 0.295 4.076SGR-76.7-0A6 3.061 3.105 4.080 0.295 4.076SGR-77.9-0A6 3.106 3.145 4.080 0.295 4.076SGR-78.9-0A6 3.146 3.185 4.080 0.295 4.076Custom Part-No Return

Catalog Number Min.shaftdiameter

Max.shaftdiameter

SGR ODTolerance +0/-0.001

ThicknessMax

BoreTolerance +0.001/-0

SGR-79.9-0A6 3.186 3.230 4.080 0.295 4.076SGR-81.1-0A6 3.231 3.270 4.080 0.295 4.076SGR-82.1-0A6 3.271 3.310 4.080 0.295 4.076SGR-83.1-0A6 3.311 3.355 4.080 0.295 4.076SGR-84.2-0A6 3.356 3.395 4.080 0.295 4.076SGR-85.2-0A6 3.396 3.435 4.580 0.295 4.576SGR-86.3-0A6 3.436 3.480 4.580 0.295 4.576SGR-87.4-0A6 3.481 3.520 4.580 0.295 4.576SGR-88.4-0A6 3.521 3.560 4.580 0.295 4.576SGR-89.4-0A6 3.561 3.605 4.580 0.295 4.576SGR-90.6-0A6 3.606 3.645 4.580 0.295 4.576SGR-91.6-0A6 3.646 3.685 4.580 0.295 4.576SGR-92.6-0A6 3.686 3.730 4.580 0.295 4.576SGR-93.8-0A6 3.731 3.770 4.580 0.295 4.576SGR-94.8-0A6 3.771 3.810 4.580 0.295 4.576SGR-95.8-0A6 3.811 3.855 4.580 0.295 4.576SGR-96.9-0A6 3.856 3.895 4.580 0.295 4.576SGR-97.9-0A6 3.896 3.935 5.080 0.295 5.076SGR-99.0-0A6 3.936 3.980 5.080 0.295 5.076SGR-100.1-0A6 3.981 4.020 5.080 0.295 5.076SGR-101.1-0A6 4.021 4.060 5.080 0.295 5.076SGR-102.1-0A6 4.061 4.105 5.080 0.295 5.076SGR-103.3-0A6 4.106 4.145 5.080 0.295 5.076SGR-104.3-0A6 4.146 4.185 5.080 0.295 5.076SGR-105.3-0A6 4.186 4.230 5.080 0.295 5.076SGR-106.5-0A6 4.231 4.270 5.080 0.295 5.076SGR-107.5-0A6 4.271 4.310 5.080 0.295 5.076SGR-108.5-0A6 4.311 4.355 5.080 0.295 5.076SGR-109.6-0A6 4.356 4.395 5.080 0.295 5.076SGR-110.6-0A6 4.396 4.435 5.580 0.295 5.576SGR-111.7-0A6 4.436 4.480 5.580 0.295 5.576SGR-112.8-0A6 4.481 4.520 5.580 0.295 5.576SGR-113.8-0A6 4.521 4.560 5.580 0.295 5.576SGR-114.8-0A6 4.561 4.605 5.580 0.295 5.576SGR-116.0-0A6 4.606 4.645 5.580 0.295 5.576SGR-117.0-0A6 4.646 4.685 5.580 0.295 5.576SGR-118.0-0A6 4.686 4.730 5.580 0.295 5.576SGR-119.2-0A6 4.731 4.770 5.580 0.295 5.576SGR-120.2-0A6 4.771 4.810 5.580 0.295 5.576SGR-121.2-0A6 4.811 4.855 5.580 0.295 5.576SGR-122.3-0A6 4.856 4.895 5.580 0.295 5.576SGR-123.3-0A6 4.896 4.935 6.080 0.295 6.076SGR-124.4-0A6 4.936 4.980 6.080 0.295 6.076SGR-125.5-0A6 4.981 5.020 6.080 0.295 6.076SGR-126.5-0A6 5.021 5.060 6.080 0.295 6.076SGR-127.5-0A6 5.061 5.105 6.080 0.295 6.076SGR-128.7-0A6 5.106 5.145 6.080 0.295 6.076SGR-129.7-0A6 5.146 5.185 6.080 0.295 6.076SGR-130.7-0A6 5.186 5.230 6.080 0.295 6.076SGR-131.9-0A6 5.231 5.270 6.080 0.295 6.076SGR-132.9-0A6 5.271 5.310 6.080 0.295 6.076SGR-133.9-0A6 5.311 5.355 6.080 0.295 6.076SGR-135.0-0A6 5.356 5.395 6.080 0.295 6.076SGR-136.0-0A6 5.396 5.435 6.580 0.295 6.576SGR-137.1-0A6 5.436 5.480 6.580 0.295 6.576SGR-138.2-0A6 5.481 5.520 6.580 0.295 6.576SGR-139.2-0A6 5.521 5.560 6.580 0.295 6.576SGR-140.2-0A6 5.561 5.605 6.580 0.295 6.576SGR-141.4-0A6 5.606 5.645 6.580 0.295 6.576SGR-142.4-0A6 5.646 5.685 6.580 0.295 6.576SGR-143.4-0A6 5.686 5.730 6.580 0.295 6.576SGR-144.6-0A6 5.731 5.770 6.580 0.295 6.576SGR-145.6-0A6 5.771 5.810 6.580 0.295 6.576SGR-146.6-0A6 5.811 5.855 6.580 0.295 6.576SGR-147.7-0A6 5.856 5.895 6.580 0.295 6.576SGR-148.7-0A6 5.896 5.935 7.080 0.295 7.076SGR-149.8-0A6 5.936 5.980 7.080 0.295 7.076SGR-150.9-0A6 5.981 6.020 7.080 0.295 7.076

Custom Part-No Return

AEGIS® SGR - Press Fit Mountingfor Low Voltage Motors to 500 HP

Dimensions in inches

Note: Use PRO Series Rings for Low Voltage Motors Greater than 500 HP and All Medium Voltage MotorsSee page 22

MOTOR

GROUNDINGBEARING

CURRENTSDC

MOTORS


PARTSLIST

MED VOLTAGEM

OTORSLOW

VOLTAGEM

OTORSAEGIS®

TECHNOLOGYINSTALL

SHAFT PREPSELECT


SPEC





Patented Technology

Solid Ring with 3 brackets

AEGIS® EP2400 Conductive Epoxy installation

MOT

ORGR

OUND

ING

BEAR

ING

CURR

ENTS

DCM

OTOR

SSH

AFT V

OLTA

GETE

STIN

GPA

RTS

LIST

MED

VOLT

AGE

MOT

ORS

LOW

VOLT

AGE

MOT

ORS

AEGI

S®TE

CHNO

LOGY

INST

ALL

SHAF

T PRE

PSE

LECT

CORR

ECT S

IZE

ENGI

NEER

ING

SPEC

• Kit is designed to avoid any slinger or shaft shoulder. Order based on NEMA or IEC Frame size.

• Install with 3 or 4 brackets depending on motor end bracket design.

• uKIT can be attached to motor with screws/washers provided or with conductive epoxy. AEGIS® EP2400 Conductive Epoxy sold separately.

• See AEGIS® website for bolt hole circle and installation. www.est-aegis.com/uKIT

AEGIS® uKIT with Universal MountingNEMA and IEC Motors for Low Voltage Motors to 500 HP


IEC uKIT - Solid RingCatalog Number

IEC uKIT - Split RingCatalog Number

Motor shaft dia “d” IEC Frame

SGR-28-UKIT SGR-28-UKIT-2A4 28mm IEC 100L, 112M (2, 4, 6, 8 pole)

SGR-38-UKIT SGR-38-UKIT-2A4 38mm IEC 132S, 132M (2, 4, 6, 8 pole)

SGR-42-UKIT SGR-42-UKIT-2A4 42mm IEC 160M, 160L (2, 4, 6, 8 pole)

SGR-48-UKIT SGR-48-UKIT-2A4 48mm IEC 180M, 180L (2, 4, 6, 8 pole)

SGR-55-UKIT SGR-55-UKIT-2A4 55mm IEC 200L (2, 4, 6, 8 pole), IEC 225S, 225M (2 pole)

SGR-60-UKIT SGR-60-UKIT-2A4 60mm IEC 225S, 225M (4, 6, 8 pole), IEC 250M (2 pole)

SGR-65-UKIT SGR-65-UKIT-2A4 65mm IEC 250M (4, 6, 8 pole), IEC 280M, 280S, 315S, 315M,315L (2 pole)

SGR-70-UKIT SGR-70-UKIT-2A4 70mm

SGR-75-UKIT SGR-75-UKIT-2A4 75mm IEC 280S, 280M (4, 6, 8 pole), IEC 355M, 355L (2 pole)

SGR-80-UKIT SGR-80-UKIT-2A4 80mm IEC 315S, 315M, 315L (4, 6, 8 pole)



SGR-95-UKIT SGR-95-UKIT-2A4 95mm IEC 335L, 335M, 355L, 355M (4, 6, 8, 10 pole)



Includes: AEGIS® SGR Bearing Protection Ring, (4) universal brackets of each size - 16 total, (4) 5-40 x 3/8” flat head screws, (4) M4 x 10 socket head cap screws, (4) M4 split lock washers, (4) M4 flat washers, 5/64” allen wrench, 3mm allen wrench

NEMA uKIT - Solid RingCatalog Number

NEMA uKIT - Split RingCatalog Number

Motor shaft dia “u” NEMA Frame

SGR-0.625-UKIT SGR-0.625-UKIT-1A4 0.625” 56

SGR-0.875-UKIT SGR-0.875-UKIT-1A4 0.875” 56HZ, 143T, 145T

SGR-1.125-UKIT SGR-1.125-UKIT-1A4 1.125” 182T, 184T


SGR-1.625-UKIT SGR-1.625-UKIT-1A4 1.625” 254T, 256T, 284TS, 286TS

SGR-1.875-UKIT SGR-1.875-UKIT-1A4 1.875” 284T, 286T, 324TS, 326TS, 364TS, 365TS

SGR-2.125-UKIT SGR-2.125-UKIT-1A4 2.125” 324T, 326T, 404TS, 405TS

SGR-2.375-UKIT SGR-2.375-UKIT-1A4 2.375” 364T, 365T, 444TS, 445TS, 447TS, 449TS


SGR-3.375-UKIT SGR-3.375-UKIT-1A4 3.375” 444T, 445T, 447T, 449T

SGR-3.625-UKIT SGR-3.625-UKIT-1A4 3.625”




Includes: AEGIS® SGR Bearing Protection Ring, (4) universal brackets of each size - 16 total, (4) 5-40 x 3/8” flat head screws. (4) 6-32 x 3/8” socket head cap screws, (4) #6 split lock washers, (4) #6 flat washers, 5/64” allen wrench, 7/64” allen wrench

Split RingSolid Ring


Patented Technology

AEGIS® PRO Seriesfor Low Voltage Motors Greater than 500 HP, All Medium Voltage Motors and DC Motors over 300 HP

AEGIS® PRO Series

AEGIS® PROSLAEGIS® PROSLRAEGIS® PROMRAEGIS® PROMAX

Shaft Diameter 2.5” to 30.00” [63.5mm to 762mm]High Current Bearing Protection for Large Motors over 500 hp and Generators (Medium Voltage-greater than 600 volts AC)

Part numbers based on shaft diameterTo size ring, see page 27Drawings available upon request

Solid and Split Ring design6 rows of fiber

Includes bolt through mounting hardware Ships with CS015 Colloidal Silver Shaft CoatingCustom brackets available upon request

Bolt Through Mounting (4x)

AEGIS® WTGSL Wind Turbine Grounding

AEGIS® WTGSL

Shaft Diameter 2.5” to 15.75” [63.5mm to 400mm]High Current Bearing Protection for Wind Turbine Generators

Outside Diameter: Shaft Diameter + 1.86” [47.24mm]Part numbers based on shaft diameterDrawings available upon request

Solid and Split Ring design6 rows of fiber

Includes bolt through mounting hardware Ships with CS015 Colloidal Silver Shaft CoatingCustom brackets available upon request

Bolt Through Mounting (4x)

AEGIS® WTG

See AEGIS website for more details:

www.est-aegis.com/WTG

MOTOR

GROUNDINGBEARING

CURRENTSDC

MOTORS


PARTSLIST

MED VOLTAGEM

OTORSLOW

VOLTAGEM

OTORSAEGIS®

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Patented Technology

AEGIS® PRO Brackets

These brackets can be used with the AEGIS®PRO Series and AEGIS® WTGSL

Part Number: BKT-PRO-1 Part Number: BKT-PRO-2

English Hardware Metric Hardware

(4) Universal brackets(4) 3/4 x 1/2” spacers(4) 3/4 x 1” spacers(4) 3/4 x 1-1/2” spacers(4) 5/16-18 x 1.25” SHCS(4) 5/16-18 x 1.75” SHCS(4) 5/16-18 x 2.25” SHCS(4) flat washers(4) lock washers

(4) Universal brackets(4) 19mm x 12.7mm spacers(4) 19mm x 25.4mm spacers(4) 19mm x 38.1mm spacers(4) M8 x 35mm SHCS(4) M8 x 45mm SHCS(4) M8 x 60mm SHCS(4) flat washers(4) lock washers

Bearing Cap Mounting Custom Mounting BracketsCustom Split Mounting Plate with tie bars

Optional Mounting Brackets for AEGIS® PRO Series and WTGSL For AEGIS® PROSL, PROSLR, PROMR, WTGSL

Custom Brackets/Installation ExamplesContact our Engineering Team for special mounting applications.

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Patented Technology

AEGIS® Shaft Voltage Tester™

Catalog Number Includes:

SVP-KIT-9100MB3 SVP tips, probe holder with two piece extension rod (total length of probe holder with extension rod is 18 inches), AEGIS® Grounding Simulator with alligator ground clip, and magnetic base.

AEGIS-SVP-510AEGIS® Shaft Voltage Probe™ PP510 with BNC connector.1 AEGIS® SVP Tip1 alligator ground clip

SVP-TIP-9100 3 SVP replacement tips only

BAT-9100 Spare/replacement battery

The AEGIS® Shaft Voltage Tester™ kit includes everything you need to start testing motor shaft voltages. At its core is a 2 channel, 100 MHz digital oscilloscope with a 5.7” screen and easy screen capture.

SVP-KIT-9100MB

AEGIS-SVP-510

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AEGIS-OSC-9100 A AEGIS-OSC-9100- W2 AEGIS-OSC-9100 MB - W2 AEGIS-OSC-9100 MB - W2-IC

AEGIS® Shaft Voltage Tester™ Digital OscilloscopeAEGIS® Shaft Voltage Probe™ with Tip InstalledSpare 1X/10X Oscilloscope Probe

USB Probe Calibration Dongle

Multimeter Test Leads

Rechargeable/replaceable Battery

Power Supply (9V, 4A DC; 120/240 VAC)

Compact Carrying Case

USB Flash drive, loaded with manual

AEGIS® Bearing Protection Handbook

Alligator Grounding Clips 1 1 2 2

Spare AEGIS® Shaft Voltage Probe™ Tips 3 3

AEGIS® Shaft Grounding Simulator™

Probe Holder

Magnetic Base

Universal Power Adapter

ISO 17025 Calibration

Warranty Length 90 days 2 years 2 years 2 years




Patented Technology

AEGIS® HFGS and Accessories

AEGIS® Colloidal Silver Shaft Coating

Catalog Number Coverage:

CS015 20-25 applications based on a 3” [76mm] shaft diameter

Used to improve the conductivity of the steel shaft surface. Apply to any VFD driven motor shaft prior to installing the AEGIS® Shaft Grounding Ring.

Note: Shelf life is 6 months. GHS SDS available at www.est-aegis.com

AEGIS® Conductive Epoxy

Catalog Number Coverage:

EP2400 2-3 applications

Used to install the AEGIS® Shaft Grounding Ring without drilling and tapping into the motor end bell.

Note: Shelf life is 9 months. GHS SDS available at www.est-aegis.com

AEGIS® HFGS High-Frequency Ground Strap Length: 12” and 24”

Catalog Number Terminations Fits Frame Sizes:

HFGS-T0410-R0312-1212” [305mm]

HFGS-T0410-R0312-2424” [610mm]

Term1: Punched hole 0.41” [10mm]

Term 2: Ring terminal for 5/16” or 8 mm screws

NEMA: 48, 48H, 56, 56H, 143T, 145T, 182T, 184T, 213T, 215TIEC: 80M, 90S, 90L

HFGS-T0660-R0312-1212” [305mm]

HFGS-T0660-R0312-2424” [610mm]



NEMA: 254T, 256T, 284T, 284TS, 286T, 286TS, 324T, 324TS, 326T, 326TS, 364T, 364TS, 365T, 365TSIEC: 100S, 100L, 112S, 112M, 132S, 132M, 160S, 160M, 160L, 180S, 180M, 180L

HFGS-T0940-R0312-1212” [305mm]

HFGS-T0940-R0312-2424” [610mm]



NEMA: 404T, 404TS, 405T, 405TS, 444T, 444TS, 445T, 445TS, 447T, 447TS, 449T, 449TSIEC: 200S, 200M, 200L, 225S, 225M, 250S, 250M, 280S, 280M

HFGS-R0312-R0312-1212” [305mm]

HFGS-R0312-R0312-2424” [610mm]



NEMA/IEC: universal terminations

Screws included

Custom lengths and terminations available on request

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Patented Technology

WARRANTY: Units are guaranteed for one year from date of purchase against defective materials and workmanship. Replacement will be made except for defects caused by abnormal use or mishandling. All statements and technical information contained herein, or presented by the manufacturer or his representative are rendered in good faith. User must assume responsibility to determine suitability of the product for intended use. The manufacturer shall not be liable for any injury, loss or damage, direct or consequential arising out of the use, or attempt to use the product.The following patents apply: 8199453, 8169766, 7193836, 7136271, 7528513, 7339777, and other patents pending.

Motors Controlled by PWM Drives (VFD)Electrical Bearing Damage Protection

Engineering Specification:

Construction Specification Institute Section 23 05 13MOTORS 23 05 2.1 MOTORS

A. General Requirements – Shaft Grounding:1. All motors operated on variable frequency drives shall be equipped with a maintenance free,

conductive micro fiber, shaft grounding ring with a minimum of two rows of circumferential micro fibers to discharge damaging shaft voltages away from the bearings to ground.

2. Application Note: Motors up to 100HP shall be provided with one shaft grounding ring installed either on the drive end or non-drive end. Motors over 100HP shall be provided with an insulated bearing on the non-drive end and a shaft grounding ring on the drive end of the motor. Grounding rings shall be provided and installed by the motor manufacturer or contractor and shall be installed in accordance with the manufacturer’s recommendations.

B. General Requirements – High-Frequency Bonding:1. All motors operated on variable frequency drives shall be bonded from the motor foot to

system ground with a high frequency ground strap made of flat braided, tinned copper with terminations to accommodate motor foot and system ground connection.

2. Application Note: Proper grounding of motor frame for all inverter-driven induction motorsReferences:

a. ABB Technical Guide No.5b. Allen Bradley Publication 1770-4.1 Application Data, Industrial Automation

Wiring and Grounding Guidelines

Recommended parts: AEGIS® Shaft Grounding Ring AEGIS® High Frequency Ground Strap

Recommended source: Electro Static Technology-ITW Manufacturer of AEGIS® Shaft Grounding Ring Ph: 207.998.5140 | [email protected] | www.est-aegis.com

Detail sheets for the AEGIS® Ring and the High Frequency Ground Strap can be downloaded atwww.est-aegis.com/specs.php

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Engineering Specification




Patented Technology

Register your motor for theAEGIS 2-Year Warranty Against Bearing Fluting Damage

Electro Static Technology (EST, AEGIS®) guarantees that AC induction motor bearings will not fail from electrical fluting damage when AEGIS® Shaft Grounding Rings have been installed with new bearings in accordance with EST’s recommended best practices, as published in the AEGIS® Bearing Protection Handbook (current edition).

The AC induction motor must meet the conditions listed below and new bearings must be installed at the time of AEGIS® Ring installation for the warranty to be approved.

For repaired motors or for field installations: Upon registration and approval the warranty shall be for 2 years from the installation date of the new motor bearings and AEGIS Ring.

For new motors with AEGIS® rings installed by the motor manufacturer: Upon registration the warranty shall be for a 2 year period after the motor manufacturer’s bearing warranty ends.

If electrically induced bearing fluting damage occurs, EST will pay the current Vaughen’s National Average Price for “Furnish/Install 2 Standard Ball Bearings” and will supply a new shaft grounding ring (SGR or PRO as appropriate) and CS015. The warranty shall apply to any AC induction motor whether new or repaired which conforms to the AEGIS® Bearing Protection Handbook’s best practices.

Conditions:

1. For All Motors: New bearings MUST be installed at the time of AEGIS® Ring installation.2. All Motors: For this warranty to be valid, the owner must register the motor within 30 days of receipt, by filling out

and submitting the information at www.est-aegis.com/warranty.3. For AC Induction motors up to 100 HP: The warranty shall apply when AEGIS® Rings have been installed on the

motor per the AEGIS® Bearing Protection Handbook’s best practices.4. AC Induction motors greater than 100 HP: The warranty shall apply when AEGIS® Rings and insulated bearings/

insulation have been installed on the motor per the AEGIS® Bearing Protection Handbook’s best practices.5. AC Induction motors greater than 500 HP and ANY motor with supply voltage of greater than 600 VAC (medium/

high voltage): The warranty shall only apply when AEGIS® PRO Series Rings and insulated bearings/insulation have been installed on the motor per the AEGIS® Bearing Protection Handbook’s best practices.

6. The best practices shall apply per the current edition of the AEGIS® Bearing Protection Handbook at the time of installation. The current best practices can be found here.

7. Selection of the applicable ring (AEGIS® SGR or PRO Series) must conform to the requirements in the AEGIS® Bearing Protection Handbook.

8. The owner of the motor must verify that the installation of AEGIS® Rings and bearing insulation, if applicable, was per the AEGIS® Bearing Protection Handbook’s best practices in order to receive approval for the warranty.

9. EST shall retain the sole authority to issue and approve the warranty for any application.10. The warranty shall be activated and conferred to the motor owner upon the issuance by EST of an email or

certificate confirming warranty acceptance.

INSTALLED

est-aegis.com/warranty

Patented Technology

SHAFT GROUNDING RING

®

Warranty

W

Award Winning Technology

CONSULTING – SPECIFYING

®

2013Winner

31 Winterbrook RoadMechanic Falls ME 04256 USAToll Free: 1-866-738-1857Ph: 207-998-5140Email: [email protected]

© 2018 Electro Static Technology Form HB3.9 08/18

aegis bearing protection ring handbook · 2020. 6. 26. · edition 3 bearing protection handbook...

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